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

作　　者：罗侃 王发强 梁瑞生 任珍珍 

机构地区：[1]Laboratory of Nanophotonic Functional Materials and Devices (SIPSE), and Laboratory of Quantum Engineering and Quantum Materials,South China Normal University

出　　处：《Chinese Physics B》2014年第10期447-457,共11页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61275059)

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.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 

分 类 号：O471.1[理学—半导体物理] TM271[理学—物理]