Antiferromagnetism and superconductivity in cerium based heavy-fermion compounds

Georg Knebel; Dai Aoki; Jacques Flouquet

doi:10.1016/j.crhy.2011.05.002

Antiferromagnetism and superconductivity in cerium based heavy-fermion compounds
[Antiferromagnétisme et supraconductivité dans des composés de fermions lourds à base de cérium]

Georg Knebel ¹ ; Dai Aoki ¹ ; Jacques Flouquet ¹

¹ SPSMS, UMR-E CEA / UJF-Grenoble 1, INAC, 38054 Grenoble, France

Comptes Rendus. Physique, Volume 12 (2011) no. 5-6, pp. 542-566.

Résumé
Abstract

La question de la compétition entre états fondamentaux possibles est centrale en matière condensée. Dans cet article, nous discutons de lʼinteraction entre supraconductivité non conventionnelle et antiferromagnétisme, au cœur de la problématique des fermions lourds à base de cérium : dans tous les exemples que nous discutons, la supraconductivité apparaît à la limite de lʼinstabilité magnétique. Nous discutons spécifiquement les cas de CeRhIn₅ et CeCoIn₅, qui permettent une description détaillée de cette interactions magnétisme-supraconductivité au niveau microscopique. La discussion est élargie brièvement au cas général des supraconducteurs à fortes corrélations électroniques, et nous terminons par le cas des systèmes non centro-symmétriques, récemment découverts, dont le paramètre dʼordre supraconducteur devrait mélanger composante paire et impaire.

The study of competing ground states is a central issue in condensed matter physics. In this article we will discuss the interplay of antiferromagnetic order and unconventional superconductivity in Ce based heavy-fermion compounds. In all examples discussed superconductivity appears at the border of magnetic order. Special focus is given on the pressure–temperature–magnetic field phase diagram of CeRhIn₅ and CeCoIn₅ which allows one to discuss microscopic coexistence of magnetic order and superconductivity in detail. A striking point is the similarity of the phase diagram of different classes of strongly correlated systems which is discussed briefly. The recently discovered non-centrosymmetric superconductors will open a new access with the possible mixing of odd and even parity pairing.

Publié le : 2011-06-01

DOI : 10.1016/j.crhy.2011.05.002

Keywords: Heavy fermions, Unconventional superconductivity, Quantum critical point, CeRhIn₅, CeCoIn₅
Mot clés : Fermions lourds, Supraconductivité non conventionnelle, Point critique quantique, CeRhIn₅, CeCoIn₅

Affiliations des auteurs :

Georg Knebel ¹ ; Dai Aoki ¹ ; Jacques Flouquet ¹

¹ SPSMS, UMR-E CEA / UJF-Grenoble 1, INAC, 38054 Grenoble, France

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Georg Knebel; Dai Aoki; Jacques Flouquet. Antiferromagnetism and superconductivity in cerium based heavy-fermion compounds. Comptes Rendus. Physique, Volume 12 (2011) no. 5-6, pp. 542-566. doi : 10.1016/j.crhy.2011.05.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.05.002/

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