自旋轨道耦合系统中的电流导致的自旋极化

J4 ›› 2009, Vol. 44 ›› Issue (11): 35-39.

自旋轨道耦合系统中的电流导致的自旋极化

赵琳,庞茂源,王春明

1. 临沂师范学院物理系, 山东临沂 276005; 2. 临沂市兰山区枣沟头镇中学, 山东临沂 276038;3. 安阳师范学院物理系, 河南安阳 455000

收稿日期:2009-03-03 出版日期:2009-11-16 发布日期:2009-11-25
作者简介:赵琳(1978)，女，硕士研究生，研究方向为自旋电子学. Email: zhaolin@lytu.edu.cn

Currentinduced spin polarization in spinorbit coupling systems

ZHAO Lin, PANG Maoyuan, WANG Chunming

1. Department of Physics, Linyi Normal University, Linyi 276005, Shandong, China; 2. Zaogoutou Middle School of Lanshan District Linyi City, Linyi 276038, Shandong, China; 3. Department of Physics, Anyang Normal University, Anyang 455000, Henan， China

Received:2009-03-03 Online:2009-11-16 Published:2009-11-25

摘要/Abstract

摘要：

研究了二维Rashba自旋轨道耦合电子系统中的电流导致的自旋极化。对于δ函数形式的短程电子杂质散射,得出了和文献一致的结果。在远处杂质散射下,自旋极化将会强烈地依赖于电子密度,这个结果完全不同于短程势散射的情况。并且随着杂质距离的变大,自旋极化增强。在这种散射势的情况下,不再能够通过测量纵向电导和磁化强度的方法来确定样品的 Rashba 自旋轨道耦合系数。

关键词: 自旋轨道耦合；自旋极化；长程电子杂质散射

Abstract:

The currentinduced spin polarization in a twodimensional electron system with Rashba spinorbit coupling is investigated. For δform electronimpurity scattering, the spin polarization is consistent with the literature. In the case of remote electronimpurity collision, the spin polarization is found to be dependent on the electron density and increases with enlargement of the impurity distance, which is in contrast to the case for shortrange potential. And the Rashba spinorbit coupling constant can not be determined by measuring the longitudinal conductivity and magnetization in this situation.

Key words: spin-orbit coupling; spin polarization; long-range electronimpurity scattering

中图分类号:

O469

赵琳,庞茂源,王春明. 自旋轨道耦合系统中的电流导致的自旋极化[J]. J4, 2009, 44(11): 35-39.

ZHAO Lin, PANG Maoyuan, WANG Chunming. Currentinduced spin polarization in spinorbit coupling systems[J]. J4, 2009, 44(11): 35-39.

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