Intrinsic Spin Hall Effect in the s-Wave Superconducting State: Analysis of the Rashba Model

被引：21
|
作者：
Kontani, H. [1 ]
Goryo, J. [1 ]
Hirashima, D. S. [1 ]
机构：
[1] Nagoya Univ, Dept Phys, Furo, Nagoya 4648602, Japan
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.102.086602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A general expression for spin Hall conductivity (SHC) in the s-wave superconducting state at finite temperatures is derived. Based on the expression, we study SHC in a two-dimensional electron gas model in the presence of Rashba spin-orbit interaction (SOI). SHC is zero in the normal state, whereas it takes a large negative value as soon as the superconductivity occurs, due to the change in the quasiparticle contributions. Since this remarkable behavior is independent of the strength of the SOI, it will be widely observed in thin films of superconductors with surface-induced Rashba SOI, or in various noncentrosymmetric superconductors.
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页数：4
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