Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

doi:10.1088/1674-1056/23/10/107103

中国物理B ›› 2014, Vol. 23 ›› Issue (10): 107103-107103.doi: 10.1088/1674-1056/23/10/107103

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

罗侃, 王发强, 梁瑞生, 任珍珍

Laboratory of Nanophotonic Functional Materials and Devices (SIPSE), and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China

收稿日期:2014-04-22 修回日期:2014-05-22 出版日期:2014-10-15 发布日期:2014-10-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61275059).

Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

Luo Kan (罗侃), Wang Fa-Qiang (王发强), Liang Rui-Sheng (梁瑞生), Ren Zhen-Zhen (任珍珍)

Laboratory of Nanophotonic Functional Materials and Devices (SIPSE), and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China

Received:2014-04-22 Revised:2014-05-22 Online:2014-10-15 Published:2014-10-15
Contact: Wang Fa-Qiang E-mail:fqwang@scnu.edu.cn
About author:71.38.-k; 72.25.-b
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61275059).

摘要/Abstract

摘要： Electronic transport through a vibrating double quantum dot (DQD) in contact with noncollinear ferromagnetic (FM) leads is investigated. The state transition between the two dots of the DQD is excited by an AC microwave driving field. The corresponding currents and differential conductance are calculated in the Coulomb blockade regime by means of the Born-Markov master equation. It is shown that the interplay between electrons and phonons gives rise to phonon-assisted tunneling resonances and Franck-Condon blockade under certain conditions. In noncollinear magnetic configurations, spin-blockade effects are also observed, and the angle of polarization has some influence on the transport characteristics.

关键词: electron-phonon, spin-polarized transport, negative differential conductance

Abstract: Electronic transport through a vibrating double quantum dot (DQD) in contact with noncollinear ferromagnetic (FM) leads is investigated. The state transition between the two dots of the DQD is excited by an AC microwave driving field. The corresponding currents and differential conductance are calculated in the Coulomb blockade regime by means of the Born-Markov master equation. It is shown that the interplay between electrons and phonons gives rise to phonon-assisted tunneling resonances and Franck-Condon blockade under certain conditions. In noncollinear magnetic configurations, spin-blockade effects are also observed, and the angle of polarization has some influence on the transport characteristics.

Key words: electron-phonon, spin-polarized transport, negative differential conductance

中图分类号: (Polarons and electron-phonon interactions)

71.38.-k

72.25.-b (Spin polarized transport)

罗侃, 王发强, 梁瑞生, 任珍珍. Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads[J]. 中国物理B, 2014, 23(10): 107103-107103.

Luo Kan (罗侃), Wang Fa-Qiang (王发强), Liang Rui-Sheng (梁瑞生), Ren Zhen-Zhen (任珍珍). Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads[J]. Chin. Phys. B, 2014, 23(10): 107103-107103.

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Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

Influence of electron-phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

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