Spin current and polarization in impure 2D electron systems with spin-orbit coupling

Details Spin current and polarization in impure 2D electron systems with spin-orbit coupling Spin current and polarization in impure 2D electron systems with spin-orbit coupling

2004-06-29

arxiv.org/abs/cond-mat/0406730v2

Phys. Rev. Lett. 93, 226602 (2004).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 figure; revised version according to referee's commments

Scientific paper

10.1103/PhysRevLett.93.226602

We derive the transport equations for two-dimensional electron systems with spin-orbit interaction and short-range spin-independent disorder. In the limit of slow spatial variations of the electron distribution we obtain coupled diffusion equations for the electron density and spin. Using these equations we calculate electric-field induced spin accumulation in a finite-size sample for arbitrary ratio between spin-orbit energy splitting and elastic scattering rate. We demonstrate that the spin-Hall conductivity vanishes in an infinite system independent of this ratio.

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