Spin Hall effect in a square 2DEG sample with a central defect

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:322

Article; Proceedings Paper

Chen, Son-Hsien¹  Klik, Ivo¹  Chang, Ching-Ray¹ 

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

关键词: Spin Hall effect;    Rashba spin-orbit coupling;    2DEG samples with defect;   

DOI  :  10.1016/j.jmmm.2009.04.085

来源: Elsevier

【 摘 要 】

We study spin and charge accumulation and currents in two-dimensional electron gas (2DEG) with spin-orbit Rashba interactions. The Landauer-Keldysh formalism is employed to numerically compute the accumulations and currents in a 2DEG finite square sample with and without an embedded spin-independent hard-wall impurity. We find that under certain conditions the charge accumulation and the spin currents may be confined to a small region of the sample, between the defect and the positive lead. the conditions for the existence of this phenomenon are described. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

Free