Spin transport properties in double quantum rings connected in series

A new model of metal/semiconductor/metal double-quantum-ring connected in series is proposed and the transport properties in this model are theoretically studied. The results imply that the transmission coefficient shows periodic variations with increasing semiconductor ring size. The effects of the...

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Bibliographic Details
Published in:Journal of semiconductors 2011-02, Vol.32 (2), p.1-5
Main Author: 杜坚 王素新 潘江洪
Format: Article
Language:English
Subjects:
Circumferences
Coefficients
Magnetic fields
Oscillations
Periodic variations
Semiconductors
Spin-orbit interactions
Transport properties
串联
传输特性
传输系数
子环
自旋态
自旋轨道相互作用
输运性质
金属/半导体
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Summary:A new model of metal/semiconductor/metal double-quantum-ring connected in series is proposed and the transport properties in this model are theoretically studied. The results imply that the transmission coefficient shows periodic variations with increasing semiconductor ring size. The effects of the magnetic field and Rashba spin-orbit interaction on the transmission coefficient for two kinds of spin state electrons are different. The number of the transmission coefficient peaks is related to the length ratio between the upper arm and the half circumference of the ring. In addition, the transmission coefficient shows oscillation behavior with enhanced external magnetic field, and the corresponding average value is related to the two leads＇ relative position.
ISSN:1674-4926
DOI:10.1088/1674-4926/32/2/022001