Spin accumulation in the electron transport with Rashba interaction

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:310

Article

Chin, Yi-Ying ; Chiu, Jui-Yu ; Chang, Ming-Che ; Mou, Chung-Yu

关键词: spin accumulation;    spin-orbit interaction;    Rashba;   

DOI  :  10.1016/j.jmmm.2006.10.1029

来源: Elsevier

【 摘 要 】

The nonequilibrium 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. (C) 2006 Elsevier B.V. All rights reserved.

【 授权许可】

Free