logo CRAS
Comptes Rendus. Physique

Physique des phénomènes ultra-rapides
Picosecond dynamics in layered cobalt perovskites studied by time-resolved Raman spectroscopy
Comptes Rendus. Physique, 8 p.

Picosecond dynamics of the photoexcited charge-ordered perovskite-type cobalt oxides La 1.5 Ca 0.5 CoO 4 and La 1.5 Sr 0.5 CoO 4 were investigated based on time-resolved Raman and reflection spectroscopy. These cobalt oxides show strong Raman scattering at around 700cm -1 , originating from the breathing vibration mode of the CoO 6 octahedron coupled with the checkerboard-type charge ordering of Co 2+ and Co 3+ . We performed time-resolved Raman and reflection spectroscopy by photoirradiating with picosecond pulses at 400 nm, exciting the charge transfer (CT) transition from the O 2p site to the Co 3d site. As a result of the excitation, the Raman intensity of the breathing mode was suppressed by 10% on a similar time scale in the reflectance change without changing the frequency of the mode, directly indicating ultrafast suppression of the order parameter of the charge-ordered state by CT transition.

Première publication : 2021-01-14
DOI : https://doi.org/10.5802/crphys.35
Mots clés : Spin crossover cobaltite, Perovskite-type oxide, Time-resolved spectroscopy, Raman spectroscopy, Femtosecond technology
     author = {Ryo Fukaya and Nao Yamaya and Tadahiko Ishikawa and Shin-ya Koshihara and Yoichi Okimoto and Ken Onda and Akira Isayama and Takao Sasagawa and Kazumasa Horigane},
     title = {Picosecond dynamics in layered cobalt perovskites studied by time-resolved Raman~spectroscopy},
     journal = {Comptes Rendus. Physique},
     eid = {1},
     publisher = {Acad\'emie des sciences, Paris},
     doi = {10.5802/crphys.35},
     language = {en},
Ryo Fukaya; Nao Yamaya; Tadahiko Ishikawa; Shin-ya Koshihara; Yoichi Okimoto; Ken Onda; Akira Isayama; Takao Sasagawa; Kazumasa Horigane. Picosecond dynamics in layered cobalt perovskites studied by time-resolved Raman spectroscopy. Comptes Rendus. Physique, 8 p. doi : 10.5802/crphys.35.

[1] Spin Crossover in Transition Metal Compounds I, II and III (P. Gutlich; H. A. Goodwin, eds.), Springer Verlag, Berlin Heidelberg, 2004

[2] Y. Okimoto; K. Kobayashi; T. Saitoh; S. Ishihara Spincrossover Cobaltites-review and Perspectives (in press, to be published by Springer)

[3] K. Asai; O. Yokokura; N. Nishimori; H. Chou; J. M. Tranquada; G. Shirane; S. Higuchi; Y. Okajima; K. Kohn Neutron-scattering study of the spin-state transition and magnetic correlations in La 1-x Sr x CoO 3 (x = 0 and 0.08), Phys. Rev. B, Volume 50 (1994), pp. 3025-3032 | Article

[4] T. Saitoh; T. Mizokawa; A. Fujimori; M. Abbate; Y. Takeda; M. Takano Electronic structure and temperature-induced paramagnetism in LaCoO 3 , Phys. Rev. B, Volume 55 (1997), pp. 4257-4266 | Article

[5] S. Yamaguchi; Y. Okimoto; Y. Tokura Local lattice distortion during the spin-state transition in LaCoO 3 , Phys. Rev. B, Volume 55 (1997), p. R8666-R8669 | Article

[6] K. Horigane; H. Hiraka; T. Uchida; K. Yamada; J. Akimitsu Spin and charge orders and their hole-doping dependence in single layered cobaltate La 2-x Ca x CoO 4 (0.3x0.8), J. Phys. Soc. Japan, Volume 76 (2007), pp. 114715-114722 | Article

[7] K. Horigane; H. Nakao; Y. Kousaka; T. Murata; Y. Noda; Y. Murakami; J. Akimitsu Crystal structure and charge-ordering in La 1.5 Ca 0.5 CoO 4 studied by neutron and resonant X-ray scattering, J. Phys. Soc. Japan, Volume 77 (2008), pp. 044601-044606 | Article

[8] Y. Moritomo; K. Higashi; K. Matsuda; A. Nakamura Spin-state transition in layered perovskite cobalt oxides: La 2-x Sr x CoO 4 (0.4x1.0), Phys. Rev. B, Volume 55 (1997), p. R14725-R14728 | Article

[9] I. A. Zaliznyak; J. P. Hill; J. M. Tranquada; R. Erwin; Y. Moritomo Independent freezing of charge and spin dynamics in La 1.5 Sr 0.5 CoO 4 , Phys. Rev. Lett., Volume 85 (2000), pp. 4353-4356 | Article

[10] C. F. Chang; Z. Hu; Hua Wu; T. Burnus; N. Hollmann; M. Benomar; T. Lorenz; A. Tanaka; H.-J. Lin; H. H. Hsieh; C. T. Chen; L. H. Tjeng Spin blockade, orbital occupation, and charge ordering in La 1.5 Sr 0.5 CoO 4 , Phys. Rev. Lett., Volume 102 (2009), pp. 116401-116404 | Article

[11] L. M. Helme; A. T. Boothroyd; R. Coldea; D. Prabhakaran; C. D. Frost; D. A. Keen; L. P. Regnault; P. G. Freeman; M. Enderle; J. Kuld Magnetic order and dynamics of the charge-ordered antiferromagnet La 1.5 Sr 0.5 CoO 4 , Phys. Rev. B, Volume 80 (2009), pp. 134414-134428 | Article

[12] H. Wu; T. Burnus Spin and orbital states in La 1.5 Sr 0.5 CoO 4 studied by electronic structure calculations, Phys. Rev. B, Volume 80 (2009), pp. 081105-081108 | Article

[13] N. Hollmann; M. W. Haverkort; M. Benomar; M. Cwik; M. Braden; T. Lorenz Evidence for a temperature-induced spin-state transition of Co 3+ in La 2-x Sr x CoO 4 , Phys. Rev. B, Volume 83 (2011), pp. 174435-174439 | Article

[14] R. Bertoni; M. Lorenc; H. Cailleau; A. Tissot; J. Laisney; M.-L. Boillot; L. Stoleriu; A. Stancu; C. Enachescu; E. Collet Elastically driven cooperative response of a molecular material impacted by a laser pulse, Nat. Mater., Volume 15 (2016), pp. 606-610 | Article

[15] H. T. Lemke; K. S. Kjar; R. Hartsock; T. B. van Driel; M. Chollet; J. M. Glownia; S. Song; D. Zhu; E. Pace; S. F. Matar; M. M. Nielsen; M. Benfatto; K. J. Gaffney; E. Collet; M. Cammarata Coherent structural trapping through wave packet dispersion during photoinduced spin state switching, Nat. Commun., Volume 8 (2017), pp. 15342-15349 | Article

[16] Y. Okimoto; X. Peng; M. Tamura; T. Morita; K. Onda; T. Ishikawa; S. Koshihara; N. Todoroki; T. Kyomen; M. Itoh Ultrasonic propagation of a metallic domain in Pr 0.5 Ca 0.5 CoO 3 undergoing a photoinduced insulator-metal transition, Phys. Rev. Lett., Volume 103 (2009), pp. 027402-027405 | Article

[17] Y. Okimoto; M. Kurashima; K. Seko; T. Ishikawa; K. Onda; S. Koshihara; T. Kyomen; M. Itoh Acceleration of domain wall movement by photoirradiation in perovskite-type cobaltite, Phys. Rev. B, Volume 83 (2011), pp. 161101-161104 | Article

[18] Y. Okimoto; S. Naruse; R. Fukaya; T. Ishikawa; S. Koshihara; K. Oka; M. Azuma; K. Tanaka; H. Hirori Ultrafast control of the polarity of BiCoO 3 by orbital excitation as investigated by femtosecond spectroscopy, Phys. Rev. Appl., Volume 7 (2017), pp. 064016-064020 | Article

[19] Y. Okimoto; T. Egawa; R. Fukaya; Y. Matsubara; Y. Yamada; N. Yamada; T. Ishikawa; K. Onda; S. Koshihara; H. Taniguchi; M. Itoh; A. Isayama; T. Sasagawa Ultrafast real space dynamics of photoexcited state in a layered perovskite-type spin crossover oxide La 1.5 Sr 0.5 CoO 4 , J. Phys. Soc. Japan, Volume 82 (2013), pp. 074721-074728 | Article

[20] Y. Kanamori; H. Matsueda; S. Ishihara Photoinduced change in the spin state of itinerant correlated electron systems, Phys. Rev. Lett., Volume 107 (2011), pp. 167403-167406 | Article

[21] Y. Okimoto; T. Miyata; M.S. Endo; M. Kurashima; K. Onda; T. Ishikawa; S. Koshihara; M. Lorenc; E. Collet; H. Cailleau; T. Arima Ultrafast spectral weight transfer in RBaCo 2 O 6-δ (R = Sm, Gd, and Tb): A role of electronic correlation in photoinduced phase transition, Phys. Rev. B, Volume 84 (2011), pp. 121102-121106 | Article

[22] K. Yamamoto; T. Kimura; T. Ishikawa; T. Katsufuji; Y. Tokura Raman spectroscopy of the charge-orbital ordering in layered manganites, Phys. Rev. B, Volume 61 (2000), pp. 14706-14715 | Article

[23] S. Uchida; H. Eisaki; S. Tajima Electron correlation and optical conductivity in high-T c copper oxides - origin of the mid-infrared absorption band, Physica B, Volume 186–188 (1993), pp. 975-980 | Article