Quantum transport in nonuniform magnetic fields: Aharonov-Bohm ring as a spin switch

被引：131
作者：
Frustaglia, D
Hentschel, M
Richter, K
机构：
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.87.256602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study spin-dependent magnetoconductance in mesoscopic rings subject to an inhomogeneous in-plane magnetic field. We show that the polarization direction of transmitted spin-polarized electrons can be controlled via an additional magnetic flux such that spin flips are induced at half a flux quantum. This quantum interference effect is independent of the strength of the nonuniform field applied. We give an analytical explanation for one-dimensional rings and numerical results for corresponding ballistic micro structures.
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页码：256602 / 1
页数：4
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