Comptes Rendus
Spin fluctuation and Fermi surface instability in ferromagnetic superconductors
Comptes Rendus. Physique, Emergent phenomena in actinides, Volume 15 (2014) no. 7, pp. 630-639.

We review the ferromagnetic superconductivity observed in the uranium based compounds, namely UGe2, URhGe and UCoGe, where the spin-triplet state is most likely realized. An unusual upper critical field Hc2, which is enhanced under a magnetic field in a certain field direction, is discussed in terms of spin fluctuations and of Fermi surface instabilities.

Dans cet article, on présente une revue des supraconducteurs ferromagnétiques à base d'uranium, tels UGe2, URhGe et UCoGe, dans lesquels l'état fondamental est un triplet de spin. Le champ critique supérieur Hc2 a un comportement non usuel dans ces composés et croît en présence d'un champ magnétique appliqué le long de certaines directions. Ce phénomène est discuté en termes de fluctuations de spin et d'instabilités de la surface de Fermi.

Published online:
DOI: 10.1016/j.crhy.2014.07.004
Keywords: Heavy fermion, Unconventional superconductivity, Ferromagnetism, UGe2, UCoGe, URhGe
Mots-clés : Fermions lourds, Supraconductivité non conventionnelle, Ferromagnetism, UGe2, UCoGe, URhGe

Dai Aoki 1, 2; Adrien Gourgout 2; Alexandre Pourret 2; Gaël Bastien 2; Georg Knebel 2; Jacques Flouquet 2

1 IMR, Tohoku University, Oarai, Ibaraki, 311-1313, Japan
2 SPSMS, UMR-E CEA/UJF-Grenoble 1, INAC, 38054 Grenoble, France
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Dai Aoki; Adrien Gourgout; Alexandre Pourret; Gaël Bastien; Georg Knebel; Jacques Flouquet. Spin fluctuation and Fermi surface instability in ferromagnetic superconductors. Comptes Rendus. Physique, Emergent phenomena in actinides, Volume 15 (2014) no. 7, pp. 630-639. doi : 10.1016/j.crhy.2014.07.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2014.07.004/

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