Spin Accumulation in the Electron Transport with Rashba Interaction

Details Spin Accumulation in the Electron Transport with Rashba Interaction Spin Accumulation in the Electron Transport with Rashba Interaction

2006-09-02

arxiv.org/abs/cond-mat/0609035v1

Journal of Magnetism and Magnetic Materials, e702-e704, (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

2 pages, 2 figures, to appear in Journal of magnetism and magnetic materials

Scientific paper

10.1016/j.jmmm.2006.10.1029

The non-equilibrium transportation of two-dimensional electrons through a narrow channel is investigated under the influence of the Rashba interaction. By introducing suitable lifetime in the Green's function, the average spin values can be calculated from the ballistic regime to the diffusive regime. It is shown that the spin accumulation is a combined effect of the spin current and disorders. In the diffusive regime, disorders offer a mechanism to stop the spin current and generate the spin accumulation. In the ballistic regime, spins are more spread out and do not have definite signs. Further consideration indicates that the inclusion of ferromagnetic spin-spin interaction increases the spin accumulation near the edge.

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