Heavy fermion superconductivity and antiferromagnetic ordering in CePt3Si without inversion symmetry
Heavy fermion superconductivity and antiferromagnetic ordering in CePt3Si without inversion symmetry
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DOI：
10.1143/jpsj.76.051009
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发表时间：
2007-05-01
影响因子：
1.7
通讯作者：
Bonalde, Ismardo
中科院分区：
文献类型：
--
作者：
Bauer, Ernst;Kaldarar, Heinich;Bonalde, Ismardo
在晶体结构没有反转对称性的情况下，重费米子超导电性基本上是由类Rashba反对称自旋轨道耦合控制的，这种耦合分裂了费米面，消除了电子的自旋简并。费米面分裂起源于超导凝聚体中自旋单态和自旋三重态的混合。这些约束导致了超导基态的各种不同寻常的特征，并在这里针对CePt3Si进行了讨论，CePt3Si是第一个缺少对称中心的重费米子超导体。我们回顾和讨论了CePt3Si的正常性质和超导性质，并将它们与最近发展起来的唯象理论联系起来。
Heavy fermion superconductivity in absence of inversion symmetry of the crystal structure is basically controlled by a Rashba-like antisymmetric spin orbit coupling which splits the Fermi surface and removes the spin degeneracy of electrons. The Fermi surface splitting originates a mixing of spin-singlet and spin-triplet states in the superconducting condensate. Such constraints are responsible for various uncommon features of the superconducting ground state and are discussed here in view of CePt3Si, the first heavy fermion superconductor missing a centre of symmetry. We recall and discuss normal and superconducting properties of CePt3Si and relate them to recently developed phenomenological theories.