Spin current and polarization in impure two-dimensional electron systems with spin-orbit coupling

被引:428
作者
Mishchenko, EG [1 ]
Shytov, AV
Halperin, BI
机构
[1] Harvard Univ, Dept Phys, Lyman Lab, Cambridge, MA 02138 USA
[2] LD Landau Theoret Phys Inst, Moscow 117334, Russia
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.93.226602
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We derive the transport equations for two-dimensional electron systems with Rashba spin-orbit interaction and short-range spin-independent disorder. In the limit of slow spatial variations, we obtain coupled diffusion equations for the electron density and spin. Using these equations we calculate electric-field induced spin accumulation and spin current in a finite-size sample for an arbitrary ratio between spin-orbit energy splitting Delta and elastic scattering rate tau(-1). We demonstrate that the spin-Hall conductivity vanishes in an infinite system independent of this ratio.
引用
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页数:4
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