The effect of periodic magnetic-electric barriers on electron transport in a nanostructure

被引：14

作者：

Lu, Han-Duo ^{[1
]}

Shao, Liang ^{[1
]}

Hou, Yang-Lai ^{[1
]}

Hou, Ting-Ping ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Dept Appl Phys, Wuhan 430081, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2007年 / 141卷 / 02期

关键词：

magnetic nanostructure; spin polarization; resonance splitting; wave-vector filtering; SPIN; SPINTRONICS; INJECTION;

D O I：

10.1016/j.ssc.2006.09.051

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using the transfer matrix method, the transmission probability, the spin polarization and the electron conductance of a ballistic electron are studied in detail in a nanostructure. We observe that these quantities sensitively depend on the number of periodic magnetic-electric barriers. As the number of periods increases, the resonance splitting increases, the number of the resonance peaks increases and the peaks become sharper as well as the spin polarization being enhanced. Surprisingly, a polarization of nearly 100% can be achieved by spin-dependent resonant tunneling in this structure, although the average magnetic field of the structure is zero. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：61 / 64

页数：4

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