Spin Hall Effect in a Diffusive Rashba Two-dimensional Electron Gas
摘要
A nonequilibrium Green's functions approach to spin-Hall effect is developed in a diffusive two-dimensional electron system with Rashba spin-orbit interaction. In the presence of long-range impurities, the coupled quantum kinetic equations are solved analytically in the self-consistent Born approximation. It is shown that the intrinsic spin-Hall effect stems from the dc-field-induced perturbation of the density of states. In addition, there is an additional disorder-mediated process, which involves the transition of nonequilibrium electrons between two spin-orbit-coupled bands. It results in an additional collision-independent spin-Hall conductivity and leads to the vanishing of the total spin-Hall current even at nonzero temperature.
引用
@article{arxiv.cond-mat/0411629,
title = {Spin Hall Effect in a Diffusive Rashba Two-dimensional Electron Gas},
author = {S. Y. Liu and X. L. Lei},
journal= {arXiv preprint arXiv:cond-mat/0411629},
year = {2007}
}
备注
mistakes in references and formulas corrected