The phase diagrams of iron-based superconductors: Theory and experiments

Alberto Martinelli; Fabio Bernardini; Sandro Massidda

doi:10.1016/j.crhy.2015.06.001

The phase diagrams of iron-based superconductors: Theory and experiments
[Les diagrammes de phases des supraconducteurs à base de fer : la théorie et les expériences]

Alberto Martinelli ¹ ; Fabio Bernardini ^2,³ ; Sandro Massidda ³

¹ SPIN-CNR, C.so Perrone 24, 16152 Genova, Italy
² Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy
³ IOM-CNR c/o Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy

Comptes Rendus. Physique, Volume 17 (2016) no. 1-2, pp. 5-35.

Résumé
Abstract

Les diagrammes de phase jouent un rôle de première importance dans la compréhension des propriétés des matériaux. En ce qui concerne les supraconducteurs à base de fer (Fe-SC), la définition correcte de leurs diagrammes de phase est cruciale à cause de l'intime interaction entre leurs propriétés cristallochimiques et magnétiques, d'une part, et la possible coexistence de magnétisme et de supraconductivité, d'autre part.

Les deux difficultés principales pour la compréhension des diagrammes de phase Fe-SC sont : 1) l'origine de la transformation structurelle ayant lieu pendant le refroidissement et sa relation avec le magnétisme ; 2) la description correcte de la région où survient un recouvrement entre les états fondamentaux électroniques, magnétiques et supraconducteur électronique survient. De ce fait, une définition appropriée et précise des frontières des phases structurelle, magnétique et électronique fournit un outil extrêmement puissant pour les scientifiques du domaine des matériaux.

Pour cette raison, une définition exacte des champs de phases thermodynamiques caractérisant les différentes propriétés structurelles et physiques impliquées est nécessaire, bien qu'elle ne soit pas aisée à obtenir dans de nombreux cas. De plus, les propriétés physiques peuvent souvent dépendre fortement de la survenue de caractéristiques micro-structurelles ou autres à l'échelle locale (micro-contraintes dans le réseau, fluctuations chimiques, parois de domaines, joints de grains, défauts), qui, d'ordinaire, ne sont pas décrites dans un diagramme de phases structurelles.

Dans cette revue, nous résumons de manière critique les résultats obtenus pour les systèmes composites le plus étudiés de types 11, 122 et 1111, qui établissent une corrélation entre les preuves expérimentales et la théorie.

Phase diagrams play a primary role in the understanding of materials properties. For iron-based superconductors (Fe-SC), the correct definition of their phase diagrams is crucial because of the close interplay between their crystallochemical and magnetic properties, on one side, and the possible coexistence of magnetism and superconductivity, on the other.

The two most difficult issues for understanding the Fe-SC phase diagrams are: 1) the origin of the structural transformation taking place during cooling and its relationship with magnetism; 2) the correct description of the region where a crossover between the magnetic and superconducting electronic ground states takes place. Hence a proper and accurate definition of the structural, magnetic and electronic phase boundaries provides an extremely powerful tool for material scientists.

For this reason, an exact definition of the thermodynamic phase fields characterizing the different structural and physical properties involved is needed, although it is not easy to obtain in many cases. Moreover, physical properties can often be strongly dependent on the occurrence of micro-structural and other local-scale features (lattice micro-strain, chemical fluctuations, domain walls, grain boundaries, defects), which, as a rule, are not described in a structural phase diagram.

In this review, we critically summarize the results for the most studied 11-, 122- and 1111-type compound systems, providing a correlation between experimental evidence and theory.

Publié le : 2015-07-10

DOI : 10.1016/j.crhy.2015.06.001

Keywords: Iron-based superconductors, Phase diagrams, Structural transformations, Superconductivity, Magnetism, Nematicity
Mot clés : Supraconducteurs à base de fer, Diagrammes de phase, Transformations structurels, Supraconductivité, Magnétisme, Phase nématique

Affiliations des auteurs :

Alberto Martinelli ¹ ; Fabio Bernardini ^{2, 3} ; Sandro Massidda ³

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Alberto Martinelli; Fabio Bernardini; Sandro Massidda. The phase diagrams of iron-based superconductors: Theory and experiments. Comptes Rendus. Physique, Volume 17 (2016) no. 1-2, pp. 5-35. doi : 10.1016/j.crhy.2015.06.001. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2015.06.001/

Bibliographie
Cité par

[1] F. Krüger; S. Kumar; J. Zaanen; J. van den Brink Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors, Phys. Rev. B, Volume 79 (2009), p. 054504

[2] W. Lv; J. Wu; P. Phillips Orbital ordering induces structural phase transition and the resistivity anomaly in iron pnictides, Phys. Rev. B, Volume 80 (2009), p. 224506

[3] C.-C. Chen; J. Maciejko; A.P. Sorini; B. Moritz; R.R.P. Singh; T.P. Devereaux Orbital order and spontaneous orthorhombicity in iron pnictides, Phys. Rev. B, Volume 82 (2010), p. 100504(R)

[4] R.M. Fernandes; A.V. Chubukov; J. Knolle; I. Eremin; J. Schmalian; Erratum Preemptive nematic order, pseudogap, and orbital order in the iron pnictides, Phys. Rev. B, Volume 85 (2012), p. 024534

[5] J. Dong; H.J. Zhang; G. Xu; Z. Li; G. Li; W.Z. Hu; D. Wu; G.F. Chen; X. Dai; J.L. Luo; Z. Fang; N.L. Wang Competing orders and spin-density-wave instability in LaO_{1 − x}F_xFeAs, Europhys. Lett., Volume 83 (2008), p. 27006

[6] C. Marini; C. Mirri; G. Profeta; S. Lupi; D. Di Castro; R. Sopracase; P. Postorino; P. Calvani; A. Perucchi; S. Massidda; G.M. Tropeano; M. Putti; A. Martinelli; A. Palenzona; P. Dore The optical phonon spectrum of SmFeAsO, Europhys. Lett., Volume 84 (2008), p. 67013

[7] A. Martinelli Symmetry – mode and spontaneous strain analysis of the structural transition in Fe_{1 + y}Te and REFeAsO compounds, J. Phys. Condens. Matter, Volume 25 (2013), p. 125703

[8] D.C. Johnston The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides, Adv. Phys., Volume 59 (2010), p. 803

[9] M.D. Lumsden; A.D. Christianson Magnetism in Fe-based superconductors, J. Phys. Condens. Matter, Volume 22 (2010), p. 203203

[10] E. Bascones; B. Valenzuela; M.J. Calderón Magnetic interactions in iron superconductors: a review, C. R. Physique, Volume 17 (2016) no. 1–2, pp. 36-59 ( in this issue )

[11] D.J. Singh; M.H. Du Density functional study of LaFeAsO_{1 − x}F_x: a low carrier density superconductor near itinerant magnetism, Phys. Rev. Lett., Volume 100 (2008), p. 237003

[12] I.I. Mazin; D.J. Singh; M.D. Johannes; M.H. Du Unconventional superconductivity with a sign reversal in the order parameter of LaFeAsO_{1 − x}F_x, Phys. Rev. Lett., Volume 101 (2008), p. 057003

[13] D.S. Inosov Spin fluctuations in iron pnictides and chalcogenides: from antiferromagnetism to superconductivity, C. R. Physique, Volume 17 (2016) no. 1–2, pp. 60-89 ( in this issue )

[14] T. Yildirim Origin of the 150 K anomaly in LaFeAsO: competing antiferromagnetic interactions, frustration, and a structural phase transition, Phys. Rev. Lett., Volume 101 (2008), p. 057010

[15] F.J. Ma; Z.Y. Lu; T. Xiang Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO, Phys. Rev. B, Volume 78 (2008), p. 224517

[16] Q.M. Si; E. Abrahams Strong correlations and magnetic frustration in the high $T_{C}$ iron pnictides, Phys. Rev. Lett., Volume 101 (2008), p. 076401

[17] C.-C. Lee; W.-G. Yin; W. Ku Ferro-orbital order and strong magnetic anisotropy in the parent compounds of iron-pnictide superconductors, Phys. Rev. Lett., Volume 103 (2009), p. 267001

[18] T. Shimojima; K. Ishizaka; Y. Ishida; N. Katayama; K. Ohgushi; T. Kiss; M. Okawa; T. Togashi; X.-Y. Wang; C.-T. Chen; S. Watanabe; R. Kadota; T. Oguchi; A. Chainani; S. Shin Orbital-dependent modifications of electronic structure across the magnetostructural transition in BaFe₂As₂, Phys. Rev. Lett., Volume 104 (2010), p. 057002

[19] (T. Hahn, ed.), International Tables for Crystallography, vol. A, International Union of Crystallography, 2005

[20] R.M. Fernandes; A.V. Chubukov; J. Schmalian What drives nematic order in iron-based superconductors?, Nat. Phys., Volume 10 (2014), p. 97

[21] P. Carretta; R. De Renzi; G. Prando; S. Sanna A view from inside iron-based superconductors, Phys. Scr., Volume 88 (2013), p. 068504

[22] E. Abrahams; Q. Si Quantum criticality in the iron pnictides and chalcogenides, J. Phys. Condens. Matter, Volume 23 (2011), p. 223201

[23] D.A. Goodman; J.W. Cahn; L.H. Bennet The centennial of the Gibbs–Konovalov rule for congruent points – its underlying theoretical basis and its application to phase diagram evaluation, Bull. Alloy Phase Diagr., Volume 2 (1981), p. 29

[24] H. Okamoto; T.B. Massalski Thermodinamically improbabile phase diagrams, J. Phase Equilib., Volume 12 (1991), p. 148

[25] A.D. Pelton Thermodynamics and phase diagrams of materials (G. Kostorz, ed.), Phase Transformations in Materials, Wiley–VCH, Weinheim, Germany, 2001 (chapter 1)

[26] Y. Mizuguchi; K. Hamada; K. Goto; H. Takatsu; H. Kadowaki; O. Miura Evolution of two-step structural phase transition in Fe_{1 + d}Te detected by low-temperature x-ray diffraction, Solid State Commun., Volume 152 (2012), p. 1047

[27] W. Bao; Y. Qiu; Q. Huang; M.A. Green; P. Zajdel; M.R. Fitzsimmons; M. Zhernenkov; S. Chang; M. Fang; B. Qian; K.E. Vehstedt; J. Yang; H.M. Pham; L. Spinu; Z.Q. Mao Tunable ( $δ π, δ π$ )-type antiferromagnetic order in α-Fe(Te, Se) superconductors, Phys. Rev. Lett., Volume 102 (2009), p. 247001

[28] C. Koz; S. Rößler; A.A. Tsirlin; S. Wirth; U. Schwarz Low-temperature phase diagram of Fe_{1 + y}Te studied using X-ray diffraction, Phys. Rev. B, Volume 88 (2013), p. 094509

[29] E.E. Rodriguez; D.A. Sokolov; C. Stock; M.A. Green; O. Sobolev; J.A. Rodriguez-Rivera; H. Cao; A. Daoud-Aladine Magnetic and structural properties near the Lifshitz point in Fe_{1 + x}Te, Phys. Rev. B, Volume 88 (2013), p. 165110

[30] Shiliang Li; C. de la Cruz; Q. Huang; Y. Chen; J.W. Lynn; Jiangping Hu; Yi-Lin Huang; Fong-Chi Hsu; Kuo-Wei Yeh; Maw-Kuen Wu; Pengcheng Dai First-order magnetic and structural phase transitions in Fe_{1 + y}Se_xTe_{1 − x}, Phys. Rev. B, Volume 79 (2009), p. 054503

[31] A. Martinelli; A. Palenzona; M. Tropeano; C. Ferdeghini; M. Putti; M.R. Cimberle; T.D. Nguyen; M. Affronte; C. Ritter From antiferromagnetism to superconductivity in Fe_{1 + y}Te_{1 − x}Se_x ( $0 \leq x \leq 0.20$ ): neutron powder diffraction analysis, Phys. Rev. B, Volume 81 (2010), p. 094115

[32] C. Stock; E.E. Rodriguez; M.A. Green; P. Zavalij; J.A. Rodriguez-Rivera Interstitial iron tuning of the spin fluctuations in the nonsuperconducting parent phase Fe_{1 + x}Te, Phys. Rev. B, Volume 84 (2011), p. 045124

[33] C.-Y. Moon; H.J. Choi Chalcogen-height dependent magnetic interactions and magnetic order switching in FeSe_xTe_{1 − x}, Phys. Rev. Lett., Volume 104 (2010), p. 057003

[34] F. Ma; W. Ji; J. Hu; Z.-Y. Lu; T. Xiang First-principles calculations of the electronic structure of tetragonal α-FeTe and α-FeSe crystals: evidence for a bicollinear antiferromagnetic order, Phys. Rev. Lett., Volume 102 (2009), p. 177003

[35] F. Caglieris; F. Ricci; G. Lamura; A. Martinelli; A. Palenzona; I. Pallecchi; A. Sala; G. Profeta; M. Putti Theoretical and experimental investigation of magnetotransport in iron chalcogenides, Sci. Technol. Adv. Mater., Volume 13 (2012), p. 054402

[36] M. Monni; F. Bernardini; G. Profeta; S. Massidda Theoretical investigation of FeTe magnetic ordering under hydrostatic pressure, Phys. Rev. B, Volume 87 (2013), p. 094516

[37] C. Fang; B.A. Bernevig; J.P. Hu Theory of magnetic order in Fe_{1 + y}Te_{1 − x}Se_x, Europhys. Lett., Volume 86 (2009), p. 67005

[38] D. Cherian; S. Rößler; C. Koz; A.A. Tsirlin; U. Schwarz; S. Wirth; S. Elizabeth Structural and thermodynamic properties of Fe_1.12Te with multiple phase transitions, J. Appl. Phys., Volume 115 (2014), p. 123912

[39] C. Zhang; W. Yi; L. Sun; X.-J. Chen; R.J. Hemley; H.-k. Mao; W. Lu; X. Dong; L. Bai; J. Liu; A.F. Moreira Dos Santos; J.J. Molaison; C.A. Tulk; G. Chen; N. Wang; Z. Zhao Pressure-induced lattice collapse in the tetragonal phase of single-crystalline Fe_1.05Te, Phys. Rev. B, Volume 80 (2009), p. 144519

[40] J.-E. Jørgensen; J. Staun Olsen; L. Gerward Compressibility of Fe_1.087Te: a high pressure X-ray diffraction study, High Press. Res., Volume 31 (2011), p. 603

[41] J.-E. Jørgensen; D. Sheptyakov Magnetic ordering in Fe_1.087Te under pressure, Eur. Phys. J. B, Volume 86 (2013), p. 18

[42] M. Bendele; A. Maisuradze; B. Roessli; S.N. Gvasaliya; E. Pomjakushina; S. Weyeneth; K. Conder; H. Keller; R. Khasanov Pressure-induced ferromagnetism in antiferromagnetic Fe_1.03Te, Phys. Rev. B, Volume 87 (2013), p. 060409(R)

[43] C. Koz; S. Rößler; A.A. Tsirlin; D. Kasinathan; C. Börrnert; M. Hanfland; H. Rosner; S. Wirth; U. Schwarz Pressure-induced successive structural transitions and high-pressure tetragonal phase of Fe_1.08Te, Phys. Rev. B, Volume 86 (2012), p. 094505

[44] M. Monni; F. Bernardini; G. Profeta; S. Massidda Theoretical investigation of FeTe magnetic ordering under hydrostatic pressure, Phys. Rev. B, Volume 87 (2013), p. 094516

[45] H. Okamoto The Fe–Se (iron–selenium) system, J. Phase Equilib., Volume 12 (1991), p. 383

[46] S. Margadonna; Y. Takabayashi; M.T. McDonald; K. Kasperkiewicz; Y. Mizuguchi; Y. Takano; A.N. Fitch; E. Suard; K. Prassides Crystal structure of the new FeSe_{1 − x} superconductor, Chem. Commun. (2008), p. 5607

[47] E. Pomjakushina; K. Conder; V. Pomjakushin; M. Bendele; R. Khasanov Synthesis, crystal structure, and chemical stability of the superconductor FeSe_{1 − x}, Phys. Rev. B, Volume 80 (2009), p. 024517

[48] Z. Li; J. Ju; J. Tang; K. Sato; M. Watahiki; K. Tanigaki Structural and superconductivity study on α-FeSe_x, J. Phys. Chem. Solids, Volume 71 (2010), p. 495

[49] T.M. McQueen; Q. Huang; V. Ksenofontov; C. Felser; Q. Xu; H. Zandbergen; Y.S. Hor; J. Allred; A.J. Williams; D. Qu; J. Checkelsky; N.P. Ong; R.J. Cava Extreme sensitivity of superconductivity to stoichiometry in Fe_{1 + δ}Se, Phys. Rev. B, Volume 79 (2009), p. 014522

[50] T.M. McQueen; A.J. Williams; P.W. Stephens; J. Tao; Y. Zhu; V. Ksenofontov; F. Casper; C. Felser; R.J. Cava Tetragonal-to-orthorhombic structural phase transition at 90 K in the superconductor Fe_1.01Se, Phys. Rev. Lett., Volume 103 (2009), p. 057002

[51] R. Khasanov; M. Bendele; K. Conder; H. Keller; E. Pomjakushina; V. Pomjakushin Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe_{1 − x}, New J. Phys., Volume 12 (2010), p. 073024

[52] A.E. Böhmer; T. Arai; F. Hardy; T. Hattori; T. Iye; T. Wolf; H.v. Löhneysen; K. Ishida; C. Meingast Origin of the tetragonal-to-orthorhombic phase transition in FeSe: a combined thermodynamic and NMR study of nematicity, Phys. Rev. Lett., Volume 114 (2015), p. 027001

[53] S.-H. Baek; D.V. Efremov; J.M. Ok; J.S. Kim; J. van den Brink; B. Büchner Orbital-driven nematicity in FeSe, Nat. Mater. (2014), pp. 210-214

[54] P. Zhang; T. Qian; P. Richard; X.P. Wang; H. Miao; B.Q. Lv; B.B. Fu; T. Wolf; C. Meingast; X.X. Wu; Z.Q. Wang; J.P. Hu; H. Ding Observation of two distinct $d_{x z} / d_{y z}$ band splittings in FeSe, Phys. Rev. B, Volume 91 (2015), p. 214503

[55] T. Imai; K. Ahilan; F.L. Ning; T.M. McQueen; R.J. Cava Why does undoped FeSe become a high- $T_{c}$ superconductor under pressure?, Phys. Rev. Lett., Volume 102 (2009), p. 177005

[56] M.C. Rahn; R.A. Ewings; S.J. Sedlmaier; S.J. Clarke; A.T. Boothroyd Strong $(π, 0)$ spin fluctuations in β-FeSe observed by neutron spectroscopy, Phys. Rev. B, Volume 91 (2015), p. 180501(R)

[57] S. Medvedev; T.M. McQueen; I.A. Troyan; T. Palasyuk; M.I. Eremets; R.J. Cava; S. Naghavi; F. Casper; V. Ksenofontov; G. Wortmann; C. Felser Electronic and magnetic phase diagram of β-Fe_1.01Se with superconductivity at 36.7 K under pressure, Nat. Mater., Volume 8 (2009), p. 630

[58] D. Braithwaite; B. Salce; G. Lapertot; F. Bourdarot; C. Marin; D. Aoki; M. Hanfland Superconducting and normal phases of FeSe single crystals at high pressure, J. Phys. Condens. Matter, Volume 21 (2009), p. 232202

[59] G. Garbarino; A. Sow; P. Lejay; A. Sulpice; P. Toulemonde; M. Mezouar; M. Núñez-Regueiro High-temperature superconductivity ( $T_{c}$ onset at 34 K) in the high-pressure orthorhombic phase of FeSe, Europhys. Lett., Volume 86 (2009), p. 27001

[60] W. Uhoya; G. Tsoi; Y. Vohra; N. Wolanyk; S.M. Rao; M.-K. Wu; S. Weir Simultaneous measurement of pressure evolution of crystal structure and superconductivity in FeSe_0.92 using designer diamonds, Europhys. Lett., Volume 99 (2012), p. 26002

[61] R.S. Kumar; Y. Zhang; S. Sinogeikin; Y. Xiao; S. Kumar; P. Chow; A.L. Cornelius; C. Chen Crystal and electronic structure of FeSe at high pressure and low temperature, J. Phys. Chem. B, Volume 114 (2010), p. 12597

[62] S. Margadonna; Y. Takabayashi; Y. Ohishi; Y. Mizuguchi; Y. Takano; T. Kagayama; T. Nakagawa; M. Takata; K. Prassides Pressure evolution of the low-temperature crystal structure and bonding of the superconductor FeSe ( $T_{c} = 37 K$ ), Phys. Rev. B, Volume 80 (2009), p. 064506

[63] M. Bendele; A. Amato; K. Conder; M. Elender; H. Keller; H.-H. Klauss; H. Luetkens; E. Pomjakushina; A. Raselli; R. Khasanov Pressure induced static magnetic order in superconducting FeSe_{1 − x}, Phys. Rev. Lett., Volume 104 (2010), p. 087003

[64] M. Bendele; A. Ichsanow; Yu. Pashkevich; L. Keller; Th. Strässle; A. Gusev; E. Pomjakushina; K. Conder; R. Khasanov; H. Keller Coexistence of superconductivity and magnetism in FeSe_{1 − x} under pressure, Phys. Rev. B, Volume 85 (2012), p. 064517

[65] A. Palenzona; A. Sala; C. Bernini; V. Braccini; M.R. Cimberle; C. Ferdeghini; G. Lamura; A. Martinelli; I. Pallecchi; G. Romano; M. Tropeano; R. Fittipaldi; A. Vecchione; A. Polyanskii; F. Kametani; M. Putti A new approach for improving global critical current density in Fe(Se_0.5Te_0.5) polycrystalline materials, Supercond. Sci. Technol., Volume 25 (2012), p. 115018

[66] H.F. Hu; J.M. Zuo; J.S. Wen; Z.J. Xu; Z.W. Lin; Q. Li; G.D. Gu; W.K. Park; L.H. Greene Phase separation in the iron chalcogenide superconductor Fe_{1 + y}Te_xSe_{1 − x}, New J. Phys., Volume 13 (2011), p. 053031

[67] X.B. He; G.R. Li; J.D. Zhang; A.B. Karki; R.Y. Jin; B.C. Sales; A.S. Sefat; M.A. McGuire; D. Mandrus; E.W. Plummer Nanoscale chemical phase separation in FeTe_0.55Se_0.45 as seen via scanning tunneling spectroscopy, Phys. Rev. B, Volume 83 (2011), p. 220502

[68] V. Bhatia; E.E. Rodriguez; N.P. Butch; J. Paglionec; M.A. Green Phase separation and superconductivity in Fe_{1 + x}Te_0.5Se_0.5, Chem. Commun., Volume 47 (2011), p. 11297

[69] D. Louca; K. Horigane; A. Llobet; R. Arita; S. Ji; N. Katayama; S. Konbu; K. Nakamura; T.-Y. Koo; P. Tong; K. Yamada Local atomic structure of superconducting FeSe_{1 − x}Te_x, Phys. Rev. B, Volume 81 (2010), p. 134524

[70] B. Joseph; A. Iadecola; A. Puri; L. Simonelli; Y. Mizuguchi; Y. Takano; N.L. Saini Evidence of local structural inhomogeneity in FeSe_{1 − x}Te_x from extended x-ray absorption fine structure, Phys. Rev. B, Volume 82 (2010), p. 020502(R)

[71] M. Tegel; C. Löhnert; D. Johrendt The crystal structure of FeSe_0.44Te_0.56, Solid State Commun., Volume 150 (2010), p. 383

[72] N.C. Gresty; Y. Takabayashi; A.Y. Ganin; M.T. McDonald; J.B. Claridge; D. Giap; Y. Mizuguchi; Y. Takano; T. Kagayama; Y. Ohishi; M. Takata; M.J. Rosseinsky; S. Margadonna; K. Prassides Structural phase transitions and superconductivity in Fe_{1 + δ}Se_0.57Te_0.43 at ambient and elevated pressures, J. Am. Chem. Soc., Volume 131 (2009), p. 16944

[73] M. Bendele; S. Weyeneth; R. Puzniak; A. Maisuradze; E. Pomjakushina; K. Conder; V. Pomjakushin; H. Luetkens; S. Katrych; A. Wisniewski; R. Khasanov; H. Keller Anisotropic superconducting properties of single-crystalline FeSe_0.5Te_0.5, Phys. Rev. B, Volume 81 (2010), p. 224520

[74] T.J. Liu; J. Hu; B. Qian; D. Fobes; Z.Q. Mao; W. Bao; M. Reehuis; S.A.J. Kimber; K. Prokeš; S. Matas; D.N. Argyriou; A. Hiess; A. Rotaru; H. Pham; L. Spinu; Y. Qiu; V. Thampy; A.T. Savici; J.A. Rodriguez; C. Broholm From ( $π, 0$ ) magnetic order to superconductivity with ( $π, π$ ) magnetic resonance in Fe_1.02Te_{1 − x}Se_x, Nat. Mater., Volume 9 (2010), p. 716

[75] N. Katayama; S. Ji; D. Louca; S. Lee; M. Fujita; T.J. Sato; J. Wen; Z. Xu; G. Gu; G. Xu; Z. Lin; M. Enoki; S. Chang; K. Yamada; J.M. Tranquada Investigation of the spin-glass regime between the antiferromagnetic and superconducting phases in Fe_{1 + y}Se_xTe_{1 − x}, J. Phys. Soc. Jpn., Volume 79 (2010), p. 113702

[76] R. Khasanov; M. Bendele; A. Amato; P. Babkevich; A.T. Boothroyd; A. Cervellino; K. Conder; S.N. Gvasaliya; H. Keller; H.-H. Klauss; H. Luetkens; V. Pomjakushin; E. Pomjakushina; B. Roessli Coexistence of incommensurate magnetism and superconductivity in Fe_{1 + y}Se_xTe_{1 − x}, Phys. Rev. B, Volume 80 (2009), p. 140511(R)

[77] Z. Xu; J. Wen; G. Xu; Q. Jie; Z. Lin; Q. Li; S. Chi; K. Singh; G. Gu; J.M. Tranquada Disappearance of static magnetic order and evolution of spin fluctuations in Fe_{1 + δ}Se_xTe_{1 − x}, Phys. Rev. B, Volume 82 (2010), p. 104525

[78] J. Wen; G. Xu; Z. Xu; Z.W. Lin; Q. Li; W. Ratcliff; G. Gu; J.M. Tranquada Short-range incommensurate magnetic order near the superconducting phase boundary in Fe_{1 + δ}Te_{1 − x}Se_x, Phys. Rev. B, Volume 80 (2009), p. 104506

[79] G. Lamura; T. Shiroka; P. Bonfà; S. Sanna; F. Bernardini; R. De Renzi; R. Vinnois; E. Giannini; A. Piriou; N. Emery; M.R. Cimberle; M. Putti A magnetic glassy phase in Fe_{1 + y}Se_xTe_{1 − x} single crystals, J. Phys. Condens. Matter, Volume 25 (2014), p. 156004

[80] R. Viennois; E. Giannini; D. van der Marel; R. Černý Effect of Fe excess on structural, magnetic and superconducting properties of single-crystalline Fe_{1 + x}Te_{1 − y}Se_y, J. Solid State Chem., Volume 183 (2010), p. 769

[81] T.J. Liu; X. Ke; B. Qian; J. Hu; D. Fobes; E.K. Vehstedt; H. Pham; J.H. Yang; M.H. Fang; L. Spinu; P. Schiffer; Y. Liu; Z.Q. Mao Charge-carrier localization induced by excess Fe in the superconductor Fe_{1 + y}Te_{1 − x}Se_x, Phys. Rev. B, Volume 80 (2009), p. 174509

[82] M. Bendele; P. Babkevich; S. Katrych; S.N. Gvasaliya; E. Pomjakushina; K. Conder; B. Roessli; A.T. Boothroyd; R. Khasanov; H. Keller Tuning the superconducting and magnetic properties of Fe_ySe_0.25Te_0.75 by varying the iron content, Phys. Rev. B, Volume 82 (2010), p. 212504

[83] K.-W. Yeh; T.-W. Huang; Y.-l. Huang; T.-K. Chen; F.-C. Hsu; P.M. Wu; Y.-C. Lee; Y.-Y. Chu; C.-L. Chen; J.-Y. Luo; D.-C. Yan; M.-K. Wu Tellurium substitution effect on superconductivity of the α-phase iron selenide, Europhys. Lett., Volume 84 (2008), p. 37002

[84] J. Kumar; S. Auluck; P.K. Ahluwalia; V.P.S. Awana Chalcogen height dependence of magnetism and Fermiology in FeTe_xSe_{1 − x}, Supercond. Sci. Technol., Volume 25 (2012), p. 095002

[85] Y. Qiu; W. Bao; Y. Zhao; C. Broholm; V. Stanev; Z. Tesanovic; Y.C. Gasparovic; S. Chang; J. Hu; B. Qian; M. Fang; Z. Mao Spin gap and resonance at the nesting wave vector in superconducting FeSe_0.4Te_0.6, Phys. Rev. Lett., Volume 103 (2009), p. 067008

[86] D.N. Argyriou; A. Hiess; A. Akbari; I. Eremin; M.M. Korshunov; J. Hu; B. Qian; Z. Mao; Y. Qiu; C. Broholm; W. Bao Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe_0.6Se_0.4 superconductor, Phys. Rev. B, Volume 81 (2010), p. 220503(R)0

[87] B.C. Sales; A.S. Sefat; M.A. McGuire; R.Y. Jin; D. Mandrus; Y. Mozharivskyj Bulk superconductivity at 14 K in single crystals of Fe_{1 + y}Te_xSe_{1 − x}, Phys. Rev. B, Volume 79 (2009), p. 094521

[88] C. Dong; H. Wang; Z. Li; J. Chen; H.Q. Yuan; M. Fang Revised phase diagram for the FeTe_{1 − x}Se_x system with fewer excess Fe atoms, Phys. Rev. B, Volume 84 (2011), p. 224506

[89] Y. Kawasaki; K. Deguchi; S. Demura; T. Watanabe; H. Okazaki; T. Ozaki; T. Yamaguchi; H. Takeyaa; Y. Takano Phase diagram and oxygen annealing effect of FeTe_{1 − x}Se_x iron-based superconductor, Solid State Commun., Volume 152 (2012), p. 1135

[90] Y. Sun; Y. Tsuchiya; T. Taen; T. Yamada; S. Pyon; A. Sugimoto; T. Ekino; Z. Shi; T. Tamegai Dynamics and mechanism of oxygen annealing in Fe_{1 + y}Te_0.6Se_0.4 single crystal, Sci. Rep., Volume 4 (2014), p. 4585

[91] K. Deguchi; Y. Takano; Y. Mizuguchi Physics and chemistry of layered chalcogenide superconductors, Sci. Technol. Adv. Mater., Volume 13 (2012), p. 054303

[92] M. Rotter; M. Tegel; D. Johrendt Superconductivity at 38 K in the iron arsenide (Ba_{1 − x}K_x)Fe₂As₂, Phys. Rev. Lett., Volume 101 (2008), p. 107006

[93] R.H. Liu; T. Wu; G. Wu; H. Chen; X.F. Wang; Y.L. Xie; J.J. Ying; Y.J. Yan; Q.J. Li; B.C. Shi; W.S. Chu; Z.Y. Wu; X.H. Chen A large iron isotope effect in SmFeAsO_{1 − x}F_x and Ba_{1 − x}K_xFe₂As₂, Nature, Volume 459 (2009), p. 64

[94] C.J. Howard; M.A. Carpenter Symmetry analysis of the structural and magnetic phase transitions in 122 iron arsenides, Acta Crystallogr., Sect. B Struct. Sci., Volume 68 (2012), p. 209

[95] M. Tegel; M. Rotter; V. Weiß; F.M. Schappacher; R. Pöttgen; D. Johrendt Structural and magnetic phase transitions in the ternary iron arsenides SrFe₂As₂ and EuFe₂As₂, J. Phys. Condens. Matter, Volume 20 (2008), p. 452201

[96] M. Rotter; M. Tegel; D. Johrendt; I. Schellenberg; W. Hermes; R. Pöttgen Spin-density-wave anomaly at 140 K in the ternary iron arsenide BaFe₂As₂, Phys. Rev. B, Volume 78 (2008), p. 020503(R)

[97] S.D. Wilson; Z. Yamani; C.R. Rotundu; B. Freelon; E. Bourret-Courchesne; R.J. Birgeneau Neutron diffraction study of the magnetic and structural phase transitions in BaFe₂As₂, Phys. Rev. B, Volume 79 (2009), p. 184519

[98] A.I. Goldman; D.N. Argyriou; B. Ouladdiaf; T. Chatterji; A. Kreyssig; S. Nandi; N. Ni; S.L. Bud'ko; P.C. Canfield; R.J. McQueeney Lattice and magnetic instabilities in CaFe₂As₂: a single-crystal neutron diffraction study, Phys. Rev. B, Volume 78 (2008), p. 100506(R)

[99] N. Ni; S. Nandi; A. Kreyssig; A.I. Goldman; E.D. Mun; S.L. Bud'ko; P.C. Canfield First-order structural phase transition in CaFe₂As₂, Phys. Rev. B, Volume 78 (2008), p. 014523

[100] J.C. Loudon; C.J. Bowell; J. Gillett; S.E. Sebastian; P.A. Midgley Determination of the nature of the tetragonal to orthorhombic phase transition in SrFe₂As₂ by measurement of the local order parameter, Phys. Rev. B, Volume 81 (2010), p. 214111

[101] A. Jesche; N. Caroca-Canales; H. Rosner; H. Borrmann; A. Ormeci; D. Kasinathan; H.H. Klauss; H. Luetkens; R. Khasanov; A. Amato; A. Hoser; K. Kaneko; C. Krellner; C. Geibel Strong coupling between magnetic and structural order parameters in SrFe₂As₂, Phys. Rev. B, Volume 78 (2008), p. 180504(R)

[102] Q. Huang; Y. Qiu Wei Bao; M.A. Green; J.W. Lynn; Y.C. Gasparovic; T. Wu; G. Wu; X.H. Chen Neutron-diffraction measurements of magnetic order and a structural transition in the parent BaFe₂As₂ compound of FeAs-based high-temperature superconductors, Phys. Rev. Lett., Volume 101 (2008), p. 257003

[103] S.-H. Baek; N.J. Curro; T. Klimczuk; E.D. Bauer; F. Ronning; J.D. Thompson First-order magnetic transition in single-crystalline CaFe₂As₂ detected by ⁷⁵As nuclear magnetic resonance, Phys. Rev. B, Volume 79 (2009), p. 052504

[104] S. Avci; O. Chmaissem; D.Y. Chung; S. Rosenkranz; E.A. Goremychkin; J.P. Castellan; I.S. Todorov; J.A. Schlueter; H. Claus; A. Daoud-Aladine; D.D. Khalyavin; M.G. Kanatzidis; R. Osborn Phase diagram of Ba_{1 − x}K_xFe₂As₂, Phys. Rev. B, Volume 85 (2012), p. 184507

[105] S. Avci; J.M. Allred; O. Chmaissem; D.Y. Chung; S. Rosenkranz; J.A. Schlueter; H. Claus; A. Daoud-Aladine; D.D. Khalyavin; P. Manuel; A. Llobet; M.R. Suchomel; M.G. Kanatzidis; R. Osborn Structural, magnetic, and superconducting properties of Ba_{1 − x}Na_xFe₂As₂, Phys. Rev. B, Volume 88 (2013), p. 094510

[106] D.B. Litvin Magnetic Group Tables, 1-, 2- and 3-Dimensional Magnetic Subperiodic Groups and Magnetic Space Groups, International Union of Crystallography, 2013

[107] H. Raffius; E. Mörsen; B.D. Mosel; W. Müller-Warmuth; W. Jeitschko; L. Terbüchte; T. Vomhof Magnetic properties of ternary lanthanoid transition metal arsenides studied by Mössbauer and susceptibility measurements, J. Phys. Chem. Solids, Volume 54 (1993), p. 135

[108] P.L. Alireza; Y.T.C. Ko; J. Gillett; C.M. Petrone; J.M. Cole; G.G. Lonzarich; S.E. Sebastian Superconductivity up to 29 K in SrFe₂As₂ and BaFe₂As₂ at high pressures, J. Phys. Condens. Matter, Volume 21 (2008), p. 012208

[109] E. Colombier; S.L. Bud'ko; N. Ni; P.C. Canfield Complete pressure-dependent phase diagrams for SrFe₂As₂ and BaFe₂As₂, Phys. Rev. B, Volume 79 (2009), p. 224518

[110] H. Kotegawa; T. Kawazoe; H. Sugawara; K. Murata; H. Tou Effect of uniaxial stress for pressure-induced superconductor SrFe₂As₂, J. Phys. Soc. Jpn., Volume 78 (2009), p. 083702

[111] T. Park; E. Park; H. Lee; T. Klimczuk; E.D. Bauer; F. Ronning; J.D. Thompson Pressure-induced superconductivity in CaFe₂As₂, J. Phys. Condens. Matter, Volume 20 (2008), p. 322204

[112] M.S. Torikachvili; S.L. Bud'ko; N. Ni; P.C. Canfield Pressure-induced superconductivity in CaFe₂As₂, Phys. Rev. Lett., Volume 101 (2008), p. 057006

[113] C.F. Miclea; M. Nicklas; H.S. Jeevan; D. Kasinathan; Z. Hossain; H. Rosner; P. Gegenwart; C. Geibel; F. Steglich Evidence for a reentrant superconducting state in EuFe₂As₂ under pressure, Phys. Rev. B, Volume 79 (2009), p. 212509

[114] M.G. Kim; R.M. Fernandes; A. Kreyssig; J.W. Kim; A. Thaler; S.L. Bud'ko; P.C. Canfield; R.J. McQueeney; J. Schmalian; A.I. Goldman Character of the structural and magnetic phase transitions in the parent and electron-doped BaFe₂As₂ compounds, Phys. Rev. B, Volume 83 (2011), p. 134522

[115] C.R. Rotundu; B. Freelon; T.R. Forrest; S.D. Wilson; P.N. Valdivia; G. Pinuellas; A. Kim; J.-W. Kim; Z. Islam; E. Bourret-Courchesne; N.E. Phillips; R.J. Birgeneau Heat capacity study of BaFe₂As₂: effects of annealing, Phys. Rev. B, Volume 82 (2010), p. 144525

[116] D. Johrendt Structure–property relationships of iron arsenide superconductors, J. Mater. Chem., Volume 21 (2011), p. 13726

[117] A. Kreyssig; M.A. Green; Y. Lee; G.D. Samolyuk; P. Zajdel; J.W. Lynn; S.L. Bud'ko; M.S. Torikachvili; N. Ni; S. Nandi; J.B. Leão; S.J. Poulton; D.N. Argyriou; B.N. Harmon; R.J. McQueeney; P.C. Canfield; A.I. Goldman Pressure-induced volume-collapsed tetragonal phase of CaFe₂As₂ as seen via neutron scattering, Phys. Rev. B, Volume 78 (2008), p. 184517

[118] A.I. Goldman; A. Kreyssig; K. Prokeš; D.K. Pratt; D.N. Argyriou; J.W. Lynn; S. Nandi; S.A.J. Kimber; Y. Chen; Y.B. Lee; G. Samolyuk; J.B. Leão; S.J. Poulton; S.L. Bud'ko; N. Ni; P.C. Canfield; B.N. Harmon; R.J. McQueeney Lattice collapse and quenching of magnetism in CaFe₂As₂ under pressure: a single-crystal neutron and X-ray diffraction investigation, Phys. Rev. B, Volume 79 (2009), p. 024513

[119] W. Uhoya; A. Stemshorn; G. Tsoi; Y.K. Vohra; A.S. Sefat; B.C. Sales; K.M. Hope; S.T. Weir Collapsed tetragonal phase and superconductivity of BaFe₂As₂ under high pressure, Phys. Rev. B, Volume 82 (2010), p. 144118

[120] W.O. Uhoya; J.M. Montgomery; G.M. Tsoi; Y.K. Vohra; M.A. McGuire; A.S. Sefat; B.C. Sales; S.T. Weir Phase transition and superconductivity of SrFe₂As₂ under high pressure, J. Phys. Condens. Matter, Volume 23 (2011), p. 122201

[121] W. Uhoya; G. Tsoi; Y.K. Vohra; M.A. McGuire; A.S. Sefat; B.C. Sales; D. Mandrus; S.T. Weir Anomalous compressibility effects and superconductivity of EuFe₂As₂ under high pressures, J. Phys. Condens. Matter, Volume 22 (2010), p. 292202

[122] A. Cano; M. Civelli; I. Eremin; I. Paul Interplay of magnetic and structural transitions in iron-based pnictide superconductors, Phys. Rev. B, Volume 82 (2010), p. 020408(R)

[123] A.E. Böhmer; P. Burger; F. Hardy; T. Wolf; P. Schweiss; R. Fromknecht; M. Reinecker; W. Schranz; C. Meingast Nematic susceptibility of hole-doped and electron-doped BaFe₂As₂ iron-based superconductors from shear modulus measurements, Phys. Rev. Lett., Volume 112 (2014), p. 047001

[124] N. Ni; A. Thaler; A. Kracher; J.Q. Yan; S.L. Bud'ko; P.C. Canfield Phase diagrams of Ba(Fe_{1 − x}M_x)₂As₂ single crystals (M = Rh and Pd), Phys. Rev. B, Volume 80 (2009), p. 024511

[125] Y. Muraba; S. Matsuishi; S.-W. Kim; T. Atou; O. Fukunaga; H. Hosono High-pressure synthesis of the indirectly electron-doped iron pnictide superconductor Sr_{1 − x}La_xFe₂As₂ with maximum $T_{c} = 22 K$ , Phys. Rev. B, Volume 82 (2010), p. 180512(R)

[126] S.R. Saha; N.P. Butch; T. Drye; J. Magill; S. Ziemak; K. Kirshenbaum; P.Y. Zavalij; J.W. Lynn; J. Paglione Structural collapse and superconductivity in rare-earth-doped CaFe₂As₂, Phys. Rev. B, Volume 85 (2012), p. 024525

[127] J.G. Storey; J.W. Loram; J.R. Cooper; Z. Bukowski; J. Karpinski Electronic specific heat of Ba_{1 − x}K_xFe₂As₂ from 2 to 380 K, Phys. Rev. B, Volume 88 (2013), p. 144502

[128] A.E. Böhmer; P. Burger; F. Hardy; T. Wolf; P. Schweiss; R. Fromknecht; M. Reinecker; W. Schranz; C. Meingast Nematic susceptibility of hole-doped and electron-doped BaFe₂As₂ iron-based superconductors from shear modulus measurements, Phys. Rev. Lett., Volume 112 (2014), p. 047001

[129] E. Wiesenmayer; H. Luetkens; G. Pascua; R. Khasanov; A. Amato; H. Potts; B. Banusch; H.-H. Klauss; D. Johrendt Microscopic coexistence of superconductivity and magnetism in Ba_{1 − x}K_xFe₂As₂, Phys. Rev. Lett., Volume 107 (2011), p. 237001

[130] S. Avci; O. Chmaissem; E.A. Goremychkin; S. Rosenkranz; J.-P. Castellan; D.Y. Chung; I.S. Todorov; J.A. Schlueter; H. Claus; M.G. Kanatzidis; A. Daoud-Aladine; D. Khalyavin; R. Osborn Magnetoelastic coupling in the phase diagram of Ba_{1 − x}K_xFe₂As₂ as seen via neutron diffraction, Phys. Rev. B, Volume 83 (2011), p. 172503

[131] D.K. Pratt; W. Tian; A. Kreyssig; J.L. Zarestky; S. Nandi; N. Ni; S.L. Bud'ko; P.C. Canfield; A.I. Goldman; R.J. McQueeney Coexistence of competing antiferromagnetic and superconducting phases in the underdoped Ba(Fe_0.953Co_0.047)₂As₂ compound using X-ray and neutron scattering techniques, Phys. Rev. Lett., Volume 103 (2009), p. 087001

[132] C. Bernhard; C.N. Wang; L. Nuccio; L. Schulz; O. Zaharko; J. Larsen; C. Aristizabal; M. Willis; A.J. Drew; G.D. Varma; T. Wolf; C. Niedermayer Muon spin rotation study of magnetism and superconductivity in Ba(Fe_{1 − x}Co_x)₂As₂ single crystals, Phys. Rev. B, Volume 86 (2012), p. 184509

[133] P. Marsik; K.W. Kim; A. Dubroka; M. Rössle; V.K. Malik; L. Schulz; C.N. Wang; Ch. Niedermayer; A.J. Drew; M. Willis; T. Wolf; C. Bernhard Coexistence and competition of magnetism and superconductivity on the nanometer scale in underdoped BaFe_1.89Co_0.11As₂, Phys. Rev. Lett., Volume 105 (2010), p. 057001

[134] M. Rotter; M. Tegel; I. Schellenberg; F.M. Schappacher; R. Pöttgen; J. Deisenhofer; A. Günther; F. Schrettle; A. Loidl; D. Johrend Competition of magnetism and superconductivity in underdoped (Ba_{1 − x}K_x)Fe₂As₂, New J. Phys., Volume 11 (2009), p. 025014

[135] Y. Laplace; J. Bobroff; V. Brouet; G. Collin; F. Rullier-Albenque; D. Colson; A. Forget Nanoscale-textured superconductivity in Ru-substituted BaFe₂As₂: a challenge to a universal phase diagram for the pnictides, Phys. Rev. B, Volume 86 (2012), p. 020510(R)

[136] C.R. Rotundu; R.J. Birgeneau First- and second-order magnetic and structural transitions in BaFe_{2(1 − x)}Co_2xAs₂, Phys. Rev. B, Volume 84 (2011), p. 092501

[137] D.J. Singh Electronic structure and doping in BaFe₂As₂ and LiFeAs: density functional calculations, Phys. Rev. B, Volume 78 (2008), p. 094511

[138] M. Neupane; P. Richard; Y.-M. Xu; K. Nakayama; T. Sato; T. Takahashi; A.V. Federov; G. Xu; X. Dai; Z. Fang; Z. Wang; G.-F. Chen; N.-L. Wang; H.-H. Wen; H. Ding Electron–hole asymmetry in the superconductivity of doped BaFe₂As₂ seen via the rigid chemical-potential shift in photoemission, Phys. Rev. B, Volume 83 (2011), p. 094522

[139] R.M. Fernandes; D.K. Pratt; W. Tian; J. Zarestky; A. Kreyssig; S. Nandi; M.G. Kim; A. Thaler; N. Ni; P.C. Canfield; R.J. McQueeney; J. Schmalian; A.I. Goldman Unconventional pairing in the iron arsenide superconductors, Phys. Rev. B, Volume 81 (2010), p. 140501

[140] R.M. Fernandes; J. Schmalian Competing order and nature of the pairing state in the iron pnictides, Phys. Rev. B, Volume 82 (2010), p. 014521

[141] Y. Laplace; J. Bobroff; F. Rullier-Albenque; D. Colson; A. Forget Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictides Ba(Fe_{1 − x}Co_x)₂As₂ single crystals, Phys. Rev. B, Volume 80 (2009), p. 140501(R)

[142] A.D. Christianson; M.D. Lumsden; S.E. Nagler; G.J. MacDougall; M.A. McGuire; A.S. Sefat; R. Jin; B.C. Sales; D. Mandrus Static and dynamic magnetism in underdoped superconductor BaFe_1.92Co_0.08As₂, Phys. Rev. Lett., Volume 103 (2009), p. 087002

[143] M. Wang; H. Luo; J. Zhao; C. Zhang; M. Wang; K. Marty; S. Chi; J.W. Lynn; A. Schneidewind; S. Li; P. Dai Electron-doping evolution of the low-energy spin excitations in the iron arsenide superconductor BaFe_{2 − x}Ni_xAs₂, Phys. Rev. B, Volume 81 (2010), p. 174524

[144] A. Kreyssig; M.G. Kim; S. Nandi; D.K. Pratt; W. Tian; J.L. Zarestky; N. Ni; A. Thaler; S.L. Bud'ko; P.C. Canfield; R.J. McQueeney; A.I. Goldman Suppression of antiferromagnetic order and orthorhombic distortion in superconducting Ba(Fe_0.961Rh_0.039)₂As₂, Phys. Rev. B, Volume 81 (2010), p. 134512

[145] D.K. Pratt; M.G. Kim; A. Kreyssig; Y.B. Lee; G.S. Tucker; A. Thaler; W. Tian; J.L. Zarestky; S.L. Bud'ko; P.C. Canfield; B.N. Harmon; A.I. Goldman; R.J. McQueeney Incommensurate spin-density wave order in electron-doped BaFe₂As₂ superconductors, Phys. Rev. Lett., Volume 106 (2011), p. 257001

[146] S. Nandi; M.G. Kim; A. Kreyssig; R.M. Fernandes; D.K. Pratt; A. Thaler; N. Ni; S.L. Bud'ko; P.C. Canfield; J. Schmalian; R.J. McQueeney; A.I. Goldman Anomalous suppression of the orthorhombic lattice distortion in superconducting Ba(Fe_{1 − x}Co_x)₂As₂ single crystals, Phys. Rev. Lett., Volume 104 (2010), p. 057006

[147] A.B. Vorontsov; M.G. Vavilov; A.V. Chubukov Superconductivity and spin-density waves in multiband metals, Phys. Rev. B, Volume 81 (2010), p. 174538

[148] Y. Gallais; R.M. Fernandes; I. Paul; L. Chauvière; Y.-X. Yang; M.-A. Méasson; M. Cazayous; A. Sacuto; D. Colson; A. Forget Observation of incipient charge nematicity in Ba(Fe_{1 − x}Co_x)₂As₂, Phys. Rev. Lett., Volume 111 (2013), p. 267001

[149] G. Wu; R.H. Liu; H. Chen; Y.J. Yan; T. Wu; Y.L. Xie; J.J. Ying; X.F. Wang; D.F. Fang; X.H. Chen Transport properties and superconductivity in Ba_{1 − x}M_xFe₂As₂ (M = La and K) with double FeAs layers, Europhys. Lett., Volume 84 (2008), p. 27010

[150] D.S. Inosov; A. Leineweber; Xiaoping Yang; J.T. Park; N.B. Christensen; R. Dinnebier; G.L. Sun; C. Niedermayer; D. Haug; P.W. Stephens; J. Stahn; O. Khvostikova; C.T. Lin; O.K. Andersen; B. Keimer; V. Hinkov Suppression of the structural phase transition and lattice softening in slightly underdoped Ba_{1 − x}K_xFe₂As₂ with electronic phase separation, Phys. Rev. B, Volume 79 (2009), p. 224503

[151] T. Goltz; V. Zinth; D. Johrendt; H. Rosner; G. Pascua; H. Luetkens; P. Materne; H.-H. Klauss Microscopic coexistence of magnetism and superconductivity in charge-compensated Ba_{1 − x}K_x(Fe_{1 − y}Co_y)₂As₂, Phys. Rev. B, Volume 89 (2014), p. 144511

[152] V. Zinth; T. Dellmann; H.-H. Klauss; D. Johrendt Recovery of a parentlike state in Ba_{1 − x}K_xFe_1.86Co_0.14As₂, Angew. Chem. Int. Ed., Volume 50 (2011), p. 7919

[153] R. Cortes-Gil; D.R. Parker; M.J. Pitcher; J. Hadermann; S.J. Clarke Indifference of superconductivity and magnetism to size-mismatched cations in the layered iron arsenides Ba_{1 − x}Na_xFe₂As₂, Chem. Mater., Volume 22 (2010), p. 4304

[154] R. Cortes-Gil; D.R. Parker; M.J. Pitcher; J. Hadermann; S.J. Clarke Indifference of superconductivity and magnetism to size-mismatched cations in the layered iron arsenides Ba_{1 − x}Na_xFe₂As₂, Chem. Mater., Volume 22 (2010), p. 4304

[155] S. Avci; O. Chmaissem; J.M. Allred; S. Rosenkranz; I. Eremin; A.V. Chubukov; D.E. Bugaris; D.Y. Chung; M.G. Kanatzidis; J.-P. Castellan; J.A. Schlueter; H. Claus; D.D. Khalyavin; P. Manuel; A. Daoud-Aladine; R. Osborn Magnetically driven suppression of nematic order in an iron-based superconductor, Nat. Commun., Volume 5 (2014), p. 3845

[156] D.D. Khalyavin; S.W. Lovesey; P. Manuel; F. Krüger; S. Rosenkranz; J.M. Allred; O. Chmaissem; R. Osborn Symmetry of reentrant tetragonal phase in Ba_{1 − x}Na_xFe₂As₂: magnetic versus orbital ordering mechanism, Phys. Rev. B, Volume 90 (2014), p. 174511

[157] F. Wasser; A. Schneidewind; Y. Sidis; S. Wurmehl; S. Aswartham; B. Büchner; M. Braden Spin reorientation in Ba_0.65Na_0.35Fe₂As₂ studied by single-crystal neutron diffraction, Phys. Rev. B, Volume 91 (2015), p. 060505

[158] S. Jiang; H. Xing; G. Xuan; C. Wang; Z. Ren; C. Feng; J. Dai; Z. Xu; G. Cao Superconductivity up to 30 K in the vicinity of the quantum critical point in BaFe₂(As_{1 − x}P_x)₂, J. Phys. Condens. Matter, Volume 21 (2009), p. 382203

[159] J.M. Allred; K.M. Taddei; D.E. Bugaris; S. Avci; D.Y. Chung; H. Claus; C. dela Cruz; M.G. Kanatzidis; S. Rosenkranz; R. Osborn; O. Chmaissem Coincident structural and magnetic order in BaFe₂(As_{1 − x}P_x)₂ revealed by high-resolution neutron diffraction, Phys. Rev. B, Volume 90 (2014), p. 104513

[160] K. Hashimoto; K. Cho; T. Shibauchi; S. Kasahara; Y. Mizukami; R. Katsumata; Y. Tsuruhara; T. Terashima; H. Ikeda; M.A. Tanatar; H. Kitano; N. Salovich; R.W. Giannetta; P. Walmsley; A. Carrington; R. Prozorov; Y. Matsuda A sharp peak of the zero-temperature penetration depth at optimal composition in BaFe₂(As_{1 − x}P_x)₂, Science, Volume 336 (2012), p. 1554

[161] D. Hu; X. Lu; W. Zhang; H. Luo; S. Li; P. Wang; G. Chen; F. Han; S.R. Banjara; A. Sapkota; A. Kreyssig; A.I. Goldman; Z. Yamani; C. Niedermayer; M. Skoulatos; R. Georgii; T. Keller; P. Wang; W. Yu; P. Dai Structural and magnetic phase transitions near optimal superconductivity in BaFe₂(As_{1 − x}P_x)₂, Phys. Rev. Lett., Volume 114 (2015), p. 157002

[162] T. Iye; M.-H. Julien; H. Mayaffre; M. Horvatić; C. Berthier; K. Ishida; H. Ikeda; S. Kasahara; T. Shibauchi; Y. Matsuda Emergence of orbital nematicity in the tetragonal phase of BaFe₂(As_{1 − x}P_x)₂, J. Phys. Soc. Jpn., Volume 84 (2015), p. 043705

[163] M. Rotter; C. Hieke; D. Johrendt Different response of the crystal structure to isoelectronic doping in BaFe₂(As_{1 − x}P_x)₂ and (Ba_{1 − x}Sr_x)Fe₂As₂, Phys. Rev. B, Volume 82 (2010), p. 014513

[164] S. Kasahara; H.J. Shi; K. Hashimoto; S. Tonegawa; Y. Mizukami; T. Shibauchi; K. Sugimoto; T. Fukuda; T. Terashima; Andriy H. Nevidomskyy; Y. Matsuda Electronic nematicity above the structural and superconducting transition in BaFe₂(As_{1 − x}P_x)₂, Nature, Volume 486 (2012), p. 382

[165] Y. Nakai; T. Iye; S. Kitagawa; K. Ishida; H. Ikeda; S. Kasahara; H. Shishido; T. Shibauchi; Y. Matsuda; T. Terashima Unconventional superconductivity and antiferromagnetic quantum critical behavior in the isovalent-doped BaFe₂(As_{1 − x}P_x)₂, Phys. Rev. Lett., Volume 105 (2010), p. 107003

[166] Y. Zheng; Y. Wang; B. Lv; C.W. Chu; R. Lortz Thermodynamic evidence for pressure-induced bulk superconductivity in the FeAs pnictide superconductor CaFe₂As₂, New J. Phys., Volume 14 (2012), p. 053034

[167] R. Hua; S. Rana; W.E. Straszheima; S.L. Bud'ko; P.C. Canfield Single crystal growth and superconductivity of Ca(Fe_{1 − x}Co_x)₂As₂, Philos. Mag., Volume 92 (2012), p. 3113

[168] M. Danura; K. Kudo; Y. Oshiro; S. Araki; T.C. Kobayashi; M. Nohara Interplay of superconductivity and Fermi-liquid transport in Rh-doped CaFe₂As₂ with lattice-collapse transition, J. Phys. Soc. Jpn., Volume 80 (2011), p. 103701

[169] S. Kasahara; T. Shibauchi; Y. Nakai; K. Hashimoto; H. Ikeda; T. Terashima; Y. Matsuda Abrupt recovery of Fermi-liquid transport by the c-axis collapse in CaFe₂(As_{1 − x}P_x)₂ single crystals, Phys. Rev. B, Volume 83 (2011), p. 060505(R)

[170] A. Amato; R. Khasanov; H. Luetkens; H.-H. Klauss Probing the ground state properties of iron-based superconducting pnictides and related systems by muon-spin spectroscopy, Physica C, Volume 469 (2009), p. 606

[171] Y. Xiao; Y. Su; R. Mittal; T. Chatterji; T. Hansen; S. Price; C.M.N. Kumar; J. Persson; S. Matsuishi; Y. Inoue; H. Hosono; T. Brueckel Neutron diffraction study of phase transitions and thermal expansion of SrFeAsF, Phys. Rev. B, Volume 81 (2010), p. 094523

[172] Y. Luo; Q. Tao; Y. Li; X. Lin; L. Li; G. Cao; Z.-a. Xu; Y. Xue; H. Kaneko; A.V. Savinkov; H. Suzuki; C. Fang; J. Hu Evidence of magnetically driven structural phase transition in RFeAsO (R = La, Sm, Gd, and Tb): a low-temperature x-ray diffraction study, Phys. Rev. B, Volume 80 (2009), p. 224511

[173] Y. Xiao; Y. Su; R. Mittal; T. Chatterji; T. Hansen; C.M.N. Kumar; S. Matsuishi; H. Hosono; T. Brueckel Magnetic order in the CaFe_{1 − x}Co_xAsF ( $x = 0.00, 0.06, 0.12$ ) superconducting compounds, Phys. Rev. B, Volume 79 (2009), p. 060504(R)

[174] C. Wang; S. Jiang; Q. Tao; Z. Ren; Y. Li; L. Li; C. Feng; J. Dai; G. Cao; Z.-a. Xu Superconductivity in LaFeAs_{1 − x}P_xO: effect of chemical pressures and bond covalency, Europhys. Lett., Volume 86 (2009), p. 47002

[175] Y. Lia; X. Lina; T. Zhoua; J. Shenb; Y. Luoa; Q. Taoa; G. Caoa; Z. Xu Superconductivity in phosphorus-doped SmFeAs_{1 − x}P_xO, Physica C, Volume 470 (2010), p. S493

[176] Y. Luo; Y. Li; S. Jiang; J. Dai; G. Cao; Z.-A. Xu Phase diagram of CeFeAs_{1 − x}P_xO obtained from electrical resistivity, magnetization, and specific heat measurements, Phys. Rev. B, Volume 81 (2010), p. 134422

[177] C. de la Cruz; W.Z. Hu; S. Li; Q. Huang; J.W. Lynn; M.A. Green; G.F. Chen; N.L. Wang; H.A. Mook; Q. Si; P. Dai Lattice distortion and magnetic quantum phase transition in CeFeAs_{1 − x}P_xO, Phys. Rev. Lett., Volume 104 (2010), p. 017204

[178] A. Jesche; T. Förster; J. Spehling; M. Nicklas; M. de Souza; R. Gumeniuk; H. Luetkens; T. Goltz; C. Krellner; M. Lang; J. Sichelschmidt; H.-H. Klauss; C. Geibel Ferromagnetism and superconductivity in CeFeAs_{1 − x}P_xO ( $0 \leq x \leq 40 %$ ), Phys. Rev. B, Volume 86 (2012), p. 020501(R)

[179] A. Martinelli; A. Palenzona; I. Pallecchi; C. Ferdeghini; M. Putti; S. Sanna; C. Curfs; C. Ritter Structural properties and phase diagram of the La(Fe_{1 − x}Ru_x)AsO system, J. Phys. Condens. Matter, Volume 25 (2013), p. 395701

[180] Y. Yiu; P. Bonfà; S. Sanna; R. De Renzi; P. Carretta; M.A. McGuire; A. Huq; S.E. Nagler Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution, Phys. Rev. B, Volume 90 (2014), p. 064515

[181] H. Okada; K. Igawa; H. Takahashi; Y. Kamihara; M. Hirano; H. Hosono; K. Matsubayashi; Y. Uwatoko Superconductivity under high pressure in LaFeAsO, J. Phys. Soc. Jpn., Volume 77 (2008), p. 113712

[182] H. Takahashi; H. Okada; K. Igawa; Y. Kamihara; M. Hirano; H. Hosono; K. Matsubayashi; Y. Uwatoko High-pressure studies on superconductivity in LaFeAsO_{1 − x}F_x and SmFeAsO_{1 − x}F_x, J. Supercond. Nov. Magn., Volume 22 (2009), p. 595

[183] D.A. Zocco; R.E. Baumbach; J.J. Hamlin; M. Janoschek; I.K. Lum; M.A. McGuire; A.S. Sefat; B.C. Sales; R. Jin; D. Mandrus; J.R. Jeffries; S.T. Weir; Y.K. Vohra; M.B. Maple Search for pressure-induced superconductivity in CeFeAsO and CeFePO iron pnictides, Phys. Rev. B, Volume 83 (2011), p. 094528

[184] H. Takahashi; K. Igawa; K. Arii; Y. Kimahara; M. Hirano; H. Hosono Superconductivity at 43 K in an iron-based layered compound LaO_{1 − x}F_xFeAs, Nature, Volume 453 (2008), p. 376

[185] W. Yi; L. Sun; Z.A. Ren; W. Lu; X. Dong; Z. Li; G. Che; J. Yang; X. Shen; X. Dai; Z. Fang; F. Zhou; Z. Zhao High-pressure study on LaFeAs(O_{1 − x}F_x) and LaFeAsO_δ with different $T_{c}$ , Europhys. Lett., Volume 84 (2008), p. 67009

[186] P.M. Shirage; K. Miyazawa; H. Kito; H. Eisaki; A. Iyo Superconductivity at 43 K at ambient pressure in the iron-based layered compound La_{1 − x}Y_xFeAsO_y, Phys. Rev. B, Volume 78 (2008), p. 172503

[187] W. Yi; X.L. Shen; W.L. Lu; Z.C. Li; Z.A. Ren; G.C. Che; X.L. Dong; F. Zhou; L.L. Sun; Z.X. Zhao Superconductivity in the mixed rare earth iron oxyarsenide La_{1 − x}Sm_xFeAsO_0.85, Supercond. Sci. Technol., Volume 21 (2008), p. 125022

[188] M. Tropeano; C. Fanciulli; F. Canepa; M.R. Cimberle; C. Ferdeghini; G. Lamura; A. Martinelli; M. Putti; M. Vignolo; A. Palenzona Effect of chemical pressure on spin density wave and superconductivity in undoped and 15% F-doped La_{1_−y}Y_yFeAsO compounds, Phys. Rev. B, Volume 79 (2009), p. 174523

[189] M. Fujioka; S.J. Denholme; T. Ozaki; H. Okazaki; K. Deguchi; S. Demura; H. Hara; T. Watanabe; H. Takeya; T. Yamaguchi; H. Kumakura; Y. Takano Phase diagram and superconductivity at 58.1 K in α-FeAs-free SmFeAsO_{1 − x}F_x, Supercond. Sci. Technol., Volume 26 (2013), p. 085023

[190] N. Takeshita; A. Iyo; H. Eisaki; H. Kito; T. Ito Remarkable suppression of $T_{c}$ by pressure in NdFeAsO_{1 − y} ( $y = 0 : 4$ ), J. Phys. Soc. Jpn., Volume 77 (2008), p. 075003

[191] C. de la Cruz; Q. Huang; J.W. Lynn; Jiying Li; W. Ratcliff; J.L. Zarestky; H.A. Mook; G.F. Chen; J.L. Luo; N.L. Wang; P. Dai Magnetic order close to superconductivity in the iron-based layered La(O_{1 − x}F_x)FeAs systems, Nature, Volume 453 (2008), p. 899

[192] H. Luetkens; H.-H. Klauss; M. Kraken; F.J. Litterst; T. Dellmann; R. Klingeler; C. Hess; R. Khasanov; A. Amato; C. Baines; M. Kosmala; O.J. Schumann; M. Braden; J. Hamann-Borrero; N. Leps; A. Kondrat; G. Behr; J. Werner; B. Büchner The electronic phase diagram of the LaO_{1 − x}F_xFeAs superconductor, Nat. Mater., Volume 8 (2009), p. 305

[193] M.A. McGuire; A.D. Christianson; A.S. Sefat; B.C. Sales; M.D. Lumsden; R. Jin; E.A. Payzant; D. Mandrus; Y. Luan; V. Keppens; V. Varadarajan; J.W. Brill; R.P. Hermann; M.T. Sougrati; F. Grandjean; G.J. Long Phase transitions in LaFeAsO: structural, magnetic, elastic, and transport properties, heat capacity and Mössbauer spectra, Phys. Rev. B, Volume 78 (2008), p. 094517

[194] T. Nomura; S.W. Kim; Y. Kamihara; M. Hirano; P.V. Sushko; K. Kato; M. Takata; A.L. Shluger; H. Hosono Crystallographic phase transition and high-Tc superconductivity in LaFeAsO:F, Supercond. Sci. Technol., Volume 21 (2008), p. 125028

[195] Q. Huang; J. Zhao; J.W. Lynn; G.F. Chen; J.L. Luo; N.L. Wang; P. Dai Doping evolution of antiferromagnetic order and structural distortion in LaFeAsO_{1 − x}F_x, Phys. Rev. B, Volume 78 (2008), p. 054529

[196] N. Qureshi; Y. Drees; J. Werner; S. Wurmehl; C. Hess; R. Klingeler; B. Büchner; M.T. Fernández-Díaz; M. Braden Crystal and magnetic structure of the oxypnictide superconductor LaFeAsO_{1 − x}F_x: a neutron-diffraction study, Phys. Rev. B, Volume 82 (2010), p. 184521

[197] H.-H. Klauss; H. Luetkens; R. Klingeler; C. Hess; F.J. Litterst; M. Kraken; M.M. Korshunov; I. Eremin; S.-L. Drechsler; R. Khasanov; A. Amato; J. Hamann-Borrero; N. Leps; A. Kondrat; G. Behr; J. Werner; B. Büchner Commensurate spin density wave in LaFeAsO: a local probe study, Phys. Rev. Lett., Volume 101 (2008), p. 077005

[198] J. Zhao; Q. Huang; C. de la Cruz; S. Li; J.W. Lynn; Y. Chen; M.A. Green; G.F. Chen; G. Li; Z. Li; J.L. Luo; N.L. Wang; P. Dai Structural and magnetic phase diagram of CeFeAsO_{1 − x}F_x and its relation to high-temperature superconductivity, Nat. Mater., Volume 7 (2008), p. 953

[199] H.-F. Li; J.-Q. Yan; J.W. Kim; R.W. McCallum; T.A. Lograsso; D. Vaknin Anisotropic magnetoelastic coupling in single-crystalline CeFeAsO as seen via high-resolution X-ray diffraction, Phys. Rev. B, Volume 84 (2011), p. 220501(R)

[200] C.R. Rotundu; D.T. Keane; B. Freelon; S.D. Wilson; A. Kim; P.N. Valdivia; E. Bourret-Courchesne; R.J. Birgeneau Phase diagram of the PrFeAsO_{1 − x}F_x superconductor, Phys. Rev. B, Volume 80 (2009), p. 144517

[201] J. Zhao; Q. Huang; C. de la Cruz; J.W. Lynn; M.D. Lumsden; Z.A. Ren; J. Yang; X. Shen; X. Dong; Z. Zhao; P. Dai Lattice and magnetic structures of PrFeAsO, PrFeAsO_0.85F_0.15, and PrFeAsO_0.85, Phys. Rev. B, Volume 78 (2008), p. 132504

[202] M. Fratini; R. Caivano; A. Puri; A. Ricci; Zhi-An Ren; Xiao-Li Dong; Jie Yang; Wei Lu; Zhong-Xian Zhao; L. Barba; G. Arrighetti; M. Polentarutti; A. Bianconi The effect of internal pressure on the tetragonal to monoclinic structural phase transition in ReOFeAs: the case of NdOFeAs, Supercond. Sci. Technol., Volume 21 (2008), p. 092002

[203] Y. Qiu; Wei Bao; Q. Huang; T. Yildirim; J.M. Simmons; M.A. Green; J.W. Lynn; Y.C. Gasparovic; J. Li; T. Wu; G. Wu; X.H. Chen Crystal structure and antiferromagnetic order in NdFeAsO_{1 − x}F_x ( $x = 0.0$ and 0.2) superconducting compounds from neutron diffraction measurements, Phys. Rev. Lett., Volume 101 (2008), p. 257002

[204] L. Malavasi; G.A. Artioli; C. Ritter; M.C. Mozzati; B. Maroni; B. Pahari; A. Caneschi Phase diagram of NdFeAsO_{1 − x}F_x: essential role of chemical composition, J. Am. Chem. Soc., Volume 132 (2010), p. 2417

[205] Y. Chen; J.W. Lynn; J. Li; G. Li; G.F. Chen; J.L. Luo; N.L. Wang; P. Dai; C. dela Cruz; H.A. Mook Magnetic order of the iron spins in NdFeAsO, Phys. Rev. B, Volume 78 (2008), p. 064515

[206] D.R. Sánchez; M. Alzamora; J. Munevar; N.L. Wang; G.F. Cheng; E. Baggio-Saitovitch Mössbauer study of superconducting NdFeAsO_0.88F_0.12 and its parent compound NdFeAsO, J. Phys. Condens. Matter, Volume 21 (2009), p. 455701

[207] S. Margadonna; Y. Takabayashi; M.T. McDonald; M. Brunelli; G. Wu; R.H. Liu; X.H. Chen; K. Prassides Crystal structure and phase transitions across the metal-superconductor boundary in the SmFeAsO_{1 − x}F_x ( $0 \leq x \leq 0.20$ ) family, Phys. Rev. B, Volume 79 (2009), p. 014503

[208] Y. Kamihara; T. Nomura; M. Hirano; J.E. Kim; K. Kato; M. Takata; Y. Kobayashi; S. Kitao; S. Higashitaniguchi; Y. Yoda; M. Seto; H. Hosono Electronic and magnetic phase diagram of superconductors, SmFeAsO_{1 − x}F_x, New J. Phys., Volume 12 (2010), p. 033005

[209] A. Martinelli; A. Palenzona; M. Tropeano; M. Putti; C. Ferdeghini; G. Profeta; E. Emerich Retention of the tetragonal to orthorhombic structural transition in F-substituted SmFeAsO: a new phase diagram for SmFeAs(O_{1 − x}F_x), Phys. Rev. Lett., Volume 106 (2011), p. 227001

[210] M.A. Carpenter; T. Boffa Ballaran The influence of elastic strain heterogeneities in silicate solid solutions (Charles A. Geiger, ed.), Solid Solutions in Silicate and Oxide Systems, EMU Notes in Mineralogy, vol. 3, 2001, p. 155

[211] R.D. Shannon Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides, Acta Crystallogr. A, Volume 32 (1976), p. 751

[212] Z. Wang; Y.J. Song; H.L. Shi; Z.W. Wang; Z. Chen; H.F. Tian; G.F. Chen; J.G. Guo; H.X. Yang; J.Q. Li Microstructure and ordering of iron vacancies in the superconductor system K_yFe_xSe₂ as seen via transmission electron microscopy, Phys. Rev. B, Volume 83 (2011), p. 140505(R)

[213] N. Lazarević; M. Abeykoon; P.W. Stephens; H. Lei; E.S. Bozin; C. Petrovic; Z.V. Popović Vacancy-induced nanoscale phase separation in K_xFe_{2 − y}Se₂ single crystals evidenced by Raman scattering and powder X-ray diffraction, Phys. Rev. B, Volume 86 (2012), p. 054503

[214] D.H. Ryan; W.N. Rowan-Weetaluktuk; J.M. Cadogan; R. Hu; W.E. Straszheim; S.L. Bud'ko; P.C. Canfield ⁵⁷Fe Mössbauer study of magnetic ordering in superconducting K_0.80Fe_1.76Se_2.00 single crystals, Phys. Rev. B, Volume 83 (2011), p. 104526

[215] G. Lang; H.-J. Grafe; D. Paar; F. Hammerath; K. Manthey; G. Behr; J. Werner; B. Büchner Nanoscale electronic order in iron pnictides, Phys. Rev. Lett., Volume 104 (2010), p. 097001

[216] S. Sanna; R. De Renzi; T. Shiroka; G. Lamura; G. Prando; P. Carretta; M. Putti; A. Martinelli; M.R. Cimberle; M. Tropeano; A. Palenzona Nanoscopic coexistence of magnetic and superconducting states within the FeAs layers of CeFeAsO_{1 − x}F_x, Phys. Rev. B, Volume 82 (2010), p. 060508(R)

[217] R.H. Liu; G. Wu; T. Wu; D.F. Fang; H. Chen; S.Y. Li; K. Liu; Y.L. Xie; X.F. Wang; R.L. Yang; L. Ding; C. He; D.L. Feng; X.H. Chen Anomalous transport properties and phase diagram of the FeAs-based SmFeAsO_{1 − x}F_x superconductors, Phys. Rev. Lett., Volume 101 (2008), p. 087001

[218] A.J. Drew; F.L. Pratt; T. Lancaster; S.J. Blundell; P.J. Baker; R.H. Liu; G. Wu; X.H. Chen; I. Watanabe; V.K. Malik; A. Dubroka; K.W. Kim; M. Rössle; C. Bernhard Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO_{1 − x}F_x measured by muon spin rotation, Phys. Rev. Lett., Volume 101 (2008), p. 097010

[219] A.J. Drew; Ch. Niedermayer; P.J. Baker; F.L. Pratt; S.J. Blundell; T. Lancaster; R.H. Liu; G. Wu; X.H. Chen; I. Watanabe; V.K. Malik; A. Dubroka; M. Rössle; K.W. Kim; C. Baines; C. Bernhard Coexistence of static magnetism and superconductivity in SmFeAsO_{1 − x}F_x as revealed by muon spin rotation, Nat. Mater., Volume 8 (2009), p. 310

[220] S. Sanna; R. De Renzi; G. Lamura; C. Ferdeghini; A. Palenzona; M. Putti; M. Tropeano; T. Shiroka Magnetic-superconducting phase boundary of SmFeAsO_{1 − x}F_x studied via muon spin rotation: unified behavior in a pnictide family, Phys. Rev. B, Volume 80 (2009), p. 052503

[221] R. Khasanov; S. Sanna; G. Prando; Z. Shermadini; M. Bendele; A. Amato; P. Carretta; R. De Renzi; J. Karpinski; S. Katrych; H. Luetkens; N.D. Zhigadlo Tuning of competing magnetic and superconducting phase volumes in LaFeAsO_0.945F_0.055 by hydrostatic pressure, Phys. Rev. B, Volume 84 (2011), p. 100501(R)

[222] G. Prando; S. Sanna; G. Lamura; T. Shiroka; M. Tropeano; A. Palenzona; H.-J. Grafe; B. Büchner; P. Carretta; R. De Renzi Phase separation at the magnetic–superconducting transition in La_0.7Y_0.3FeAsO_{1 − x}F_x, Phys. Status Solidi B, Volume 250 (2013), p. 599

[223] T. Shiroka; G. Lamura; S. Sanna; G. Prando; R. De Renzi; M. Tropeano; M.R. Cimberle; A. Martinelli; C. Bernini; A. Palenzona; R. Fittipaldi; A. Vecchione; P. Carretta; A.S. Siri; C. Ferdeghini; M. Putti Long- to short-range magnetic order in fluorine-doped CeFeAsO, Phys. Rev. B, Volume 84 (2011), p. 195123

[224] S.A.J. Kimber; D.N. Argyriou; F. Yokaichiya; K. Habicht; S. Gerischer; T. Hansen; T. Chatterji; R. Klingeler; C. Hess; G. Behr; A. Kondrat; B. Büchner Magnetic ordering and negative thermal expansion in PrFeAsO, Phys. Rev. B, Volume 78 (2008), p. 140503(R)

[225] L. Ding; C. He; J.K. Dong; T. Wu; R.H. Liu; X.H. Chen; S.Y. Li Specific heat of the iron-based high- $T_{c}$ superconductor SmO_{1 − x}F_xFeAs, Phys. Rev. B, Volume 77 (2008), p. 180510(R)

[226] D.H. Ryan; J.M. Cadogan; C. Ritter; F. Canepa; A. Palenzona; M. Putti Coexistence of long-ranged magnetic order and superconductivity in the pnictide superconductor SmFeAsO_{1 − x}F_x ( $x = 0$ , 0.15), Phys. Rev. B, Volume 80 (2009), p. 220503(R)

[227] A. Martinelli; A. Palenzona; M. Tropeano; M. Putti; C. Ferdeghini; G. Profeta; E. Emerich Retention of the tetragonal to orthorhombic structural transition in F-substituted SmFeAsO: a new phase diagram for SmFeAs(O_{1 − x}F_x), Phys. Rev. Lett., Volume 106 (2011), p. 227001

[228] M. Majumder; K. Ghoshray; C. Mazumdar; A. Poddar; A. Ghoshray; D. Berardan; N. Dragoe Evidence of a structural phase transition in superconducting SmFeAsO_{1 − x}F_x from ¹⁹F NMR, J. Phys. Condens. Matter, Volume 25 (2013), p. 025701

[229] T. Hanna; Y. Muraba; S. Matsuishi; N. Igawa; K. Kodama; S.-i. Shamoto; H. Hosono Hydrogen in layered iron arsenides: indirect electron doping to induce superconductivity, Phys. Rev. B, Volume 84 (2011), p. 024521

[230] S. Iimura; S. Matsuishi; H. Sato; T. Hanna; Y. Muraba; S.W. Kim; J.E. Kim; M. Takata; H. Hosono Two-dome structure in electron-doped iron arsenide superconductors, Nat. Commun., Volume 3 (2012), p. 943

[231] S. Matsuishi; T. Hanna; Y. Muraba; S.W. Kim; J.E. Kim; M. Takata; S.-i. Shamoto; R.I. Smith; H. Hosono Structural analysis and superconductivity of CeFeAsO_{1 − x}H_x, Phys. Rev. B, Volume 85 (2012), p. 014514

[232] Z.-A. Ren; G.-C. Che; X.-L. Dong; J. Yang; W. Lu; W. Yi; X.-L. Shen; Z.-C. Li; L.-L. Sun; F. Zhou; Z.-X. Zhao Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO_{1 − δ} (Re = rare-earth metal) without fluorine doping, Europhys. Lett., Volume 83 (2008), p. 17002

[233] K. Kasperkiewicz; J.W.G. Bos; A.N. Fitch; K. Prassides; S. Margadonna Structural and electronic response upon hole doping of rare-earth iron oxyarsenides Nd_{1 − x}Sr_xFeAsO ( $0 < x \leq 0.2$ ), Chem. Commun. (2009), p. 707

[234] G. Mu; B. Zeng; X. Zhu; F. Han; P. Cheng; B. Shen; H.-H. Wen Synthesis, structural, and transport properties of the hole-doped superconductor Pr_{1 − x}Sr_xFeAsO, Phys. Rev. B, Volume 79 (2009), p. 104501

[235] J. Ju; Z. Li; G. Mu; H.-H. Wen; K. Sato; M. Watahiki; G. Li; K. Tanigaki A structural study of the hole-doped superconductors Pr_{1 − x}Sr_xFeAsO, New J. Phys., Volume 11 (2009), p. 083003

[236] G. Mu; B. Zeng; P. Cheng; X. Zhu; F. Han; B. Shen; H.-H. Wen Superconductivity at 15.6 K in calcium-doped Tb_{1 − x}Ca_xFeAsO: the structure requirement for achieving superconductivity in the hole-doped 1111 phase, Europhys. Lett., Volume 89 (2010), p. 27002

[237] H.-H. Wen; G. Mu; L. Fang; H. Yang; X. Zhu Superconductivity at 25 K in hole-doped (La_{1 − x}Sr_x)OFeAs, Europhys. Lett., Volume 82 (2008), p. 17009

[238] K. Miyazawa; K. Kihou; P.M. Shirage; C.-H. Lee; H. Kito; H. Eisaki; A. Iyo Superconductivity above 50 K in LnFeAsO_{1 − y} (Ln = Nd, Sm, Gd, Tb, and Dy) synthesized by high-pressure technique, J. Phys. Soc. Jpn., Volume 78 (2009), p. 034712

[239] Z.-A. Ren; G.-C. Che; X.-L. Dong; J. Yang; W. Lu; W. Yi; X.-L. Shen; Z.-C. Li; L.-L. Sun; F. Zhou; Z. -Xian Zhao Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO_{1 − δ} (Re = rare-earth metal) without fluorine doping, Europhys. Lett., Volume 83 (2008), p. 17002

[240] C.H. Lee; A. Iyo; H. Eisaki; H. Kito; M.T. Fernandez-Diaz; T. Ito; K. Kihou; H. Matsuhata; M. Braden; K. Yamada Effect of structural parameters on superconductivity in fluorine-free LnFeAsO_{1 − y} (Ln = La, Nd), J. Phys. Soc. Jpn., Volume 77 (2008), p. 083704

[241] F. Hammerath; P. Bonfà; S. Sanna; G. Prando; R. De Renzi; Y. Kobayashi; M. Sato; P. Carretta Poisoning effect of Mn in LaFe_{1 − x}Mn_xAsO_0.89F_0.11: unveiling a quantum critical point in the phase diagram of iron-based superconductors, Phys. Rev. B, Volume 89 (2014), p. 134503

[242] M. Sato; Y. Kobayashi; S.C. Lee; H. Takahashi; E. Satomi; Y. Miura Studies on effects of impurity doping and NMR measurements of La 1111 and/or Nd 1111 Fe-pnictide superconductors, J. Phys. Soc. Jpn., Volume 79 (2010), p. 014710

[243] S.J. Singh; J. Shimoyama; A. Yamamoto; H. Ogino; K. Kishio Effects of Mn and Ni doping on the superconductivity of SmFeAs(O,F), Physica C, Volume 494 (2013), p. 57

[244] C. Wang; Y.K. Li; Z.W. Zhu; S. Jiang; X. Lin; Y.K. Luo; S. Chi; L.J. Li; Z. Ren; M. He; H. Chen; Y.T. Wang; Q. Tao; G.H. Cao; Z.A. Xu Effects of cobalt doping and phase diagrams of LFe_{1 − x}Co_xAsO (L = La and Sm), Phys. Rev. B, Volume 79 (2009), p. 054521

[245] G. Prando; O. Vakaliuk; S. Sanna; G. Lamura; T. Shiroka; P. Bonfà; P. Carretta; R. De Renzi; H.-H. Klauss; C.G.F. Blum; S. Wurmehl; C. Hess; B. Buchner Role of in-plane and out-of-plane dilution in CeFeAsO: charge doping versus disorder, Phys. Rev. B, Volume 87 (2013), p. 174519

[246] T. Shang; L. Yang; Y. Chen; N. Cornell; F. Ronning; J.L. Zhang; L. Jiao; Y.H. Chen; J. Chen; A. Howard; J. Dai; J.D. Thompson; A. Zakhidov; M.B. Salamon; H.Q. Yuan Tunable interplay between 3d and 4f electrons in Co-doped iron pnictides, Phys. Rev. B, Volume 87 (2013), p. 075148

[247] X. Lin; H.J. Guo; C.Y. Shen; Y.K. Luo; Q. Tao; G.H. Cao; Z.A. Xu Charge compensation effect in Pr_{1 − y}Sr_yFe_{1 − x}Co_xAsO codoped with Sr and Co, Phys. Rev. B, Volume 83 (2011), p. 014503

[248] S.K. Kim; M.E. Tillman; H. Kim; A. Kracher; S.L. Bud'ko; R. Prozorov; P.C. Canfield Growth and characterization of Nd(Fe_{1 − x}Co_x)AsO single crystals, Supercond. Sci. Technol., Volume 23 (2010), p. 054008

[249] Y. Qi; L. Wang; Z. Gao; D. Wang; X. Zhang; C. Yao; C. Wang; C. Wang; Y. Ma Superconductivity and magnetic properties in SmFe_{1 − x}Co_xAsO ( $x = 0$ to 1), Europhys. Lett., Volume 96 (2011), p. 17007

[250] V.P.S. Awana; A. Pal; M. Hussain; H. Kishan Appearance and disappearance of superconductivity with Fe site co substitution in SmFe_{1 − x}Co_xAsO ( $x = 0.0$ to 1.0), J. Supercond. Nov. Magn., Volume 24 (2011), p. 151

[251] A. Marcinkova; D.A.M. Grist; I. Margiolaki; T.C. Hansen; S. Margadonna; J.-W.G. Bos Superconductivity in NdFe_{1 − x}Co_xAsO ( $0.05 < x < 0.20$ ) and rare-earth magnetic ordering in NdCoAsO, Phys. Rev. B, Volume 81 (2010), p. 064511

[252] A.S. Sefat; A. Huq; M.A. McGuire; R. Jin; B.C. Sales; D. Mandrus; L.M.D. Cranswick; P.W. Stephens; K.H. Stone Superconductivity in LaFe_{1 − x}Co_xAsO, Phys. Rev. B, Volume 78 (2008), p. 104505

[253] T. Nomura; Y. Inoue; S. Matsuishi; M. Hirano; J.E. Kim; K. Kato; M. Takata; H. Hosono Comparison of crystal structures and the effects of Co substitution in a new member of the Fe-1111 superconductor family AeFeAsF (Ae = Ca and Sr): a possible candidate for a higher- $T_{c}$ superconductor, Supercond. Sci. Technol., Volume 22 (2009), p. 055016

[254] G. Long; M. DeMarco; M. Chudyk; J. Steiner; D. Coffey; H. Zeng; Y.K. Li; G.H. Cao; Z.A. Xu Coexistence of magnetic fluctuations and superconductivity in SmFe_0.95Co_0.05AsO seen in ⁵⁷Fe Mössbauer spectroscopy, Phys. Rev. B, Volume 84 (2011), p. 064423

[255] S. Takeshita; R. Kadono; M. Hiraishi; M. Miyazaki; A. Koda; S. Matsuishi; H. Hosono Insular superconductivity in a Co-doped iron pnictide CaFe_{1 − x}Co_xAsF, Phys. Rev. Lett., Volume 103 (2009), p. 027002

[256] Y. Xiao; Y. Su; R. Mittal; T. Chatterji; T. Hansen; C.M.N. Kumar; S. Matsuishi; H. Hosono; T. Brueckel Magnetic order in the CaFe_{1 − x}Co_xAsF ( $x = 0.00, 0.06, 0.12$ ) superconducting compounds, Phys. Rev. B, Volume 79 (2009), p. 060504(R)

[257] M. Tropeano; M.R. Cimberle; C. Ferdeghini; G. Lamura; A. Martinelli; A. Palenzona; I. Pallecchi; A. Sala; M. Putti; F. Bernardini; M. Monni; S. Massidda; I. Sheikin Isoelectronic Ru substitution at Fe-site in Sm(Fe_{1 − x}Ru_x)As(O_0.85F_0.15) compound and its effects on structural, superconducting and normal state properties, Phys. Rev. B, Volume 81 (2010), p. 184504

[258] C. Wang; H. Jiang; Y. Luo; C. Feng; W. Li; Z. Xu; G. Cao; J.H. Kim; S. Dou Structural control of d–f interaction in the CeFe_{1 − x}Ru_xAsO system, Europhys. Lett., Volume 99 (2012), p. 57009

[259] S. Sanna; P. Carretta; P. Bonfà; G. Prando; G. Allodi; R. De Renzi; T. Shiroka; G. Lamura; A. Martinelli; M. Putti Correlated trends of coexisting magnetism and superconductivity in optimally electron-doped oxy-pnictides, Phys. Rev. Lett., Volume 107 (2011), p. 227003

[260] S. Sanna; P. Carretta; R. De Renzi; G. Prando; P. Bonfà; M. Mazzani; G. Lamura; T. Shiroka; Y. Kobayashi; M. Sato Onset of magnetism in optimally electron-doped LFe_{1 − x}Ru_xAsO_{1 − y}F_y (L = La, Nd, or Sm) superconductors around $x = 1 / 4$ , Phys. Rev. B, Volume 87 (2013), p. 134518

[261] Y. Kamihara; H. Hiramatsu; M. Hirano; R. Kawamura; H. Yanagi; T. Kamiya; H. Hosono Iron-based layered superconductor: LaOFeP, J. Am. Chem. Soc., Volume 128 (2006), p. 10012

[262] C. Wang; S. Jiang; Q. Tao; Z. Ren; Y. Li; L. Li; C. Feng; J. Dai; G. Cao; Z.-a. Xu Superconductivity in LaFeAs_{1 − x}P_xO: effect of chemical pressures and bond covalency, Europhys. Lett., Volume 86 (2009), p. 47002

[263] K. Mydeen; E. Lengyel; A. Jesche; C. Geibel; M. Nicklas Hydrostatic and chemical pressure tuning of CeFeAs_{1 − x}P_xO single crystals, Phys. Rev. B, Volume 86 (2012), p. 134523

[264] N.D. Zhigadlo; S. Katrych; M. Bendele; P.J.W. Moll; M. Tortello; S. Weyeneth; V.Yu. Pomjakushin; J. Kanter; R. Puzniak; Z. Bukowski; H. Keller; R.S. Gonnelli; R. Khasanov; J. Karpinski; B. Batlogg Interplay of composition, structure, magnetism, and superconductivity in SmFeAs_{1 − x}P_xO_{1 − y}, Phys. Rev. B, Volume 84 (2011), p. 134526

[265] J. Paglione; R.L. Greene High-temperature superconductivity in iron-based materials, Nat. Phys., Volume 6 (2010), p. 645

[266] N.D. Mathur; F.M. Grosche; S.R. Julian; I.R. Walker; D.M. Freye; R.K.W. Haselwimmer; G.G. Lonzarich Magnetically mediated superconductivity in heavy fermion compounds, Nature, Volume 394 (1998), p. 39

[267] G. Burns; A.M. Glazer, Academic Press (2013), p. 359

[268] M. Vojta Lattice symmetry breaking in cuprate superconductors: stripes, nematics, and superconductivity, Adv. Phys., Volume 58 (2009), p. 699

[269] J. Chang; E. Blackburn; A.T. Holmes; N.B. Christensen; J. Larsen; J. Mesot; Ruixing Liang; D.A. Bonn; W.N. Hardy; A. Watenphul; M.v. Zimmermann; E.M. Forgan; S.M. Hayden Direct observation of competition between superconductivity and charge density wave order in YBa₂Cu₃O_6.67, Nat. Phys., Volume 8 (2012), p. 871

[270] M. Marezio Oxygen stoichiometry in high- $T_{c}$ superconductors, Acta Crystallogr. A, Volume 47 (1991), p. 640

[271] D. Jaccard; H. Wilhelm; D. Jérome; J. Moser; C. Carcel; J.M. Fabre From spin-Peierls to superconductivity: (TMTTF)₂PF₆ under high pressure, J. Phys. Condens. Matter, Volume 13 (2001), p. L89

[272] K. Shimizu; T. Kimura; S. Furomoto; K. Takeda; K. Kontani; Y. Onuki; K. Amaya Superconductivity in the non-magnetic state of iron under pressure, Nature, Volume 412 (2001), p. 316

[273] S.S. Saxena; P.B. Littlewood Iron cast in exotic role, Nature, Volume 412 (2001), p. 290

[274] R.M. Fernandes; J. Schmalian Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides, Supercond. Sci. Technol., Volume 25 (2012), p. 084005

[275] R.M. Fernandes; L.H. VanBebber; S. Bhattacharya; P. Chandra; V. Keppens; D. Mandrus; M.A. McGuire; B.C. Sales; A.S. Sefat; J. Schmalian Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors, Phys. Rev. Lett., Volume 105 (2010), p. 157003

[276] T. Shimojima; Y. Suzuki; T. Sonobe; A. Nakamura; M. Sakano; J. Omachi; K. Yoshioka; M. Kuwata-Gonokami; K. Ono; H. Kumigashira; A.E. Böhmer; F. Hardy; T. Wolf; C. Meingast; H.v. Löhneysen; H. Ikeda; K. Ishizaka Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe, Phys. Rev. B, Volume 90 (2014), p. 121111(R)

[277] M.D. Watson; T.K. Kim; A.A. Haghighirad; N.R. Davies; A. McCollam; A. Narayanan; S.F. Blake; Y.L. Chen; S. Ghannadzadeh; A.J. Schofield; M. Hoesch; C. Meingast; T. Wolf; A.I. Coldea Phys. Rev. B, 91 (2015), p. 155106

[278] Y. Kim; H. Oh; C. Kim; D. Song; W. Jung; B. Kim; H.J. Choi; C. Kim; B. Lee; S. Khim; H. Kim; K. Kim; J. Hong; Y. Kwon Electronic structure of detwinned BaFe₂As₂ from photoemission and first principles, Phys. Rev. B, Volume 83 (2011), p. 064509

[279] M. Yi; D.H. Lu; J.-H. Chu; J.G. Analytis; A.P. Sorini; A.F. Kemper; S.-K. Mo; R.G. Moore; M. Hashimoto; W.S. Lee; Z. Hussain; T.P. Devereaux; I.R. Fisher; Z.-X. Shen Symmetry-breaking orbital anisotropy observed for detwinned Ba(Fe_{1 − x}Co_x)₂As₂ above the spin density wave transition, Proc. Natl. Acad. Sci. USA, Volume 108 (2011), p. 6878

[280] T. Shimojima; T. Sonobe; W. Malaeb; K. Shinada; A. Chainani; S. Shin; T. Yoshida; S. Ideta; A. Fujimori; H. Kumigashira; K. Ono; Y. Nakashima; H. Anzai; M. Arita; A. Ino; H. Namatame; M. Taniguchi; M. Nakajima; S. Uchida; Y. Tomioka; T. Ito; K. Kihou; C.H. Lee; A. Iyo; H. Eisaki; K. Ohgushi; S. Kasahara; T. Terashima; H. Ikeda; T. Shibauchi; Y. Matsuda; K. Ishizaka Pseudogap formation above the superconducting dome in iron pnictides, Phys. Rev. B, Volume 89 (2014), p. 045101

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