Comptes Rendus
Spin fluctuation and Fermi surface instability in ferromagnetic superconductors
[Fluctuation de spins et instabilité de la surface de Fermi dans les supraconducteurs ferromagnétiques]
Comptes Rendus. Physique, Volume 15 (2014) no. 7, pp. 630-639.

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.

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.

Publié le :
DOI : 10.1016/j.crhy.2014.07.004
Keywords: Heavy fermion, Unconventional superconductivity, Ferromagnetism, UGe2, UCoGe, URhGe
Mot 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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     title = {Spin fluctuation and {Fermi} surface instability in ferromagnetic superconductors},
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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, 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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