Nonlocal Andreev reflection with Rashba spin-orbital interaction in a triple-quantum-dot ring

We theoretically studied the nonlocal Andreev reflection with Rashba spin-orbital interaction in a triple-quantumdot （QD） ring, which is introduced as Rashba spin-orbital interaction to act locally on one component quantum dot. It is found that the electronic current and spin current are sensitive t...

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Bibliographic Details
Published in:Chinese physics B 2010-12, Vol.19 (12), p.489-494, Article 127402
Main Author: 彭菊 郁华玲 左芬
Format: Article
Language:English
Subjects:
电子电流
组成部分
自旋流
自旋电流
自旋轨道相互作用
自旋进动
量子点
非局部
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Summary:We theoretically studied the nonlocal Andreev reflection with Rashba spin-orbital interaction in a triple-quantumdot （QD） ring, which is introduced as Rashba spin-orbital interaction to act locally on one component quantum dot. It is found that the electronic current and spin current are sensitive to the systematic parameters. The interdot spin-flip term does not play a leading role in causing electronic and spin currents. Otherwise the spin precessing terra leads to shift of the peaks of the the spin-up and spin-down electronic currents in different directions and results in the spin current. Moreover, the spin-orbital interaction suppresses the nonlocal Andreev reflection, so we cannot obtain the pure spin current.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/12/127402