Asymmetric effect on spin polarization in a spin-filter device using nonmagnetic triple-barrier structure

被引：8

作者：

Shang, CE ^{[1
]}

Guo, Y ^{[1
]}

Chen, XY ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 96卷 / 06期

关键词：

D O I：

10.1063/1.1778817

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the asymmetric effect in a spin-filter device, which is based on the Rashba spin-orbit coupling effect and uses a nonmagnetic tunneling diode. The structural asymmetry is introduced by unequivalence of the two quantum wells in the spin-filter device. It is found that the structural asymmetry can greatly change spin-filtering efficiency. For some asymmetric spin-filter structures, one can see spin-dependent enhancement in the transmission. Moreover, the current density can increase or decrease greatly depending on the degree of the structural asymmetry. (C) 2004 American Institute of Physics.

引用

页码：3339 / 3342

页数：4

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