Spin-dependent perpendicular magnetotransport through a tunable ZnSe/Zn1-xMnxSe heterostructure:: A possible spin filter?

被引：199
|
作者：
Egues, JC [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis Sao Carlos, Dept Fis & Informat, BR-13560970 Sao Carlos, SP, Brazil
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 20期
关键词：
D O I：
10.1103/PhysRevLett.80.4578
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This work addresses spin-dependent magnetotransport in a band-gap-matched ZnSe/Zn1-xMnxSe heterostructure. In an external magnetic field the paramagnetic layer behaves as a potential well for spin-down electrons and a potential barrier for spin-up ones. My current-density calculation shows a strong suppression of the spin-up component of the current density for increasing magnetic fields; the total current density is dominated by the spin-down component for B > 2 T. This result gives rise to the possibility of devising spin filters relevant for spin-dependent optoelectronics.
引用
收藏
页码：4578 / 4581
页数：4
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