Disorder effects on the spin-Hall current in a diffusive Rashba two-dimensional heavy-hole system
Abstract
We investigate the spin-Hall effect in a two-dimensional heavy-hole system with Rashba spin-orbit coupling using a nonequilibrium Green's function approach. Both the short- and long-range disorder scatterings are considered in the self-consistent Born approximation. We find that, in the case of long-range collisions, the disorder-mediated process leads to an enhancement of the spin-Hall current at high heavy-hole density, whereas for short-range scatterings it gives a vanishing contribution. This result suggests that the recently observed spin-Hall effect in experiment is a result of the sum of the intrinsic and disorder-mediated contributions. We have also calculated the temperature dependence of spin-Hall conductivity, which reveals a decrease with increasing the temperature.
Cite
@article{arxiv.cond-mat/0503352,
title = {Disorder effects on the spin-Hall current in a diffusive Rashba two-dimensional heavy-hole system},
author = {S. Y. Liu and X. L. Lei},
journal= {arXiv preprint arXiv:cond-mat/0503352},
year = {2009}
}
Comments
5 pages, 2 figures, Typos in the values of hole density corrected