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

doi:10.1088/1674-1056/19/12/127402

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127402-127402.doi: 10.1088/1674-1056/19/12/127402

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

彭菊, 郁华玲, 左芬

School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huaian 223300, China

收稿日期:2010-04-29 修回日期:2010-07-03 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
Project supported by the Natural Science Foundation of Education Bureau of Jiangsu Province of China (Grant Nos. 08KJB140002 and 09KJD430004).

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

Peng Ju(彭菊)^†, Yu Hua-Ling(郁华玲), and Zuo Fen(左芬)

School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huaian 223300, China

Received:2010-04-29 Revised:2010-07-03 Online:2010-12-15 Published:2010-12-15
Supported by:
Project supported by the Natural Science Foundation of Education Bureau of Jiangsu Province of China (Grant Nos. 08KJB140002 and 09KJD430004).

摘要/Abstract

摘要： We theoretically studied the nonlocal Andreev reflection with Rashba spin–orbital interaction in a triple-quantum-dot (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 term 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.

Abstract: We theoretically studied the nonlocal Andreev reflection with Rashba spin–orbital interaction in a triple-quantum-dot (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 term 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.

Key words: nonlocal Andreev reflection, Rashba spin–orbital interaction, spin flip, spin precess

中图分类号: (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

71.70.Ej

73.21.La (Quantum dots)

彭菊, 郁华玲, 左芬. Nonlocal Andreev reflection with Rashba spin–orbital interaction in a triple-quantum-dot ring[J]. 中国物理B, 2010, 19(12): 127402-127402.

Peng Ju(彭菊), Yu Hua-Ling(郁华玲), and Zuo Fen(左芬). Nonlocal Andreev reflection with Rashba spin–orbital interaction in a triple-quantum-dot ring[J]. Chin. Phys. B, 2010, 19(12): 127402-127402.

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

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

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