Photon-assisted electronic and spin transport through two T-shaped three-quantum-dot molecules embedded in an Aharonov-Bohm interferometer

We investigate the time-modulated electronic and spin transport properties through two T-shaped three-quantum-dot molecules embedded in an Aharonov-Bohm（A-B） interferometer. By using the Keldysh non-equilibrium Green＇s function technique, the photon-assisted spin-dependent average current is analyze...

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Published inChinese physics B Vol. 26; no. 11; pp. 460 - 468
Main Author 白继元;李立;贺泽龙;叶树江;赵树军;党随虎;孙伟民
Format Journal Article
LanguageEnglish
Published 01.11.2017
Subjects
光子
分子
嵌入
干涉仪
格林函数方法
电子自旋
运输
量子点
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Summary:We investigate the time-modulated electronic and spin transport properties through two T-shaped three-quantum-dot molecules embedded in an Aharonov-Bohm（A-B） interferometer. By using the Keldysh non-equilibrium Green＇s function technique, the photon-assisted spin-dependent average current is analyzed. The T-shaped three-quantum-dot molecule A-B interferometer exhibits excellent controllability in the average current resonance spectra by adjusting the interdot coupling strength, Rashba spin-orbit coupling strength, magnetic flux, and amplitude of the time-dependent external field.Efficient spin filtering and multiple electron-photon pump functions are exploited in the multi-quantum-dot molecule A-B interferometer by a time-modulated external field.
Bibliography:non-equilibrium Green＇s function photon-assisted electron transport Aharonov-Bohm interferometer Rashba spin-orbit coupling
Jiyuan Bai1,3, Li Li1, Zelong He2, Shujiang Ye3, ShujunZhao3, SuihuDang2, WeiminSun1（ 1 Key Laboratory of In-fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China; 2School of Electronic and Information Engineering, Yangtze Normal University, Chongqing 408003, China ;3 School of Electrical and Information Engineering, Heilongfiang Institute of Technology, Harbin 150050, China）
We investigate the time-modulated electronic and spin transport properties through two T-shaped three-quantum-dot molecules embedded in an Aharonov-Bohm（A-B） interferometer. By using the Keldysh non-equilibrium Green＇s function technique, the photon-assisted spin-dependent average current is analyzed. The T-shaped three-quantum-dot molecule A-B interferometer exhibits excellent controllability in the average current resonance spectra by adjusting the interdot coupling strength, Rashba spin-orbit coupling strength, magnetic flux, and amplitude of the time-dependent external field.Efficient spin filtering and multiple electron-photon pump functions are exploited in the multi-quantum-dot molecule A-B interferometer by a time-modulated external field.
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/11/117302