Spin-Dependent Electron Properties of a Triple-Terminal Quantum Dot Structure  

作　　者：HAN Yu GONG Wei-Jiang WEI Guo-Zhu 

机构地区：[1]Department of Physics, Liaoning University, Shenyang 110036, China [2]College of Sciences, Northeastern University, Shenyang 110004, China [3]International Center for Material Physics, Acadmia Sinica, Shenyang 110015, China

出　　处：《Communications in Theoretical Physics》2009年第12期1117-1124,共8页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.10847109;the Education Department of Liaoning Province under Grant No.2009A309

摘　　要：Electron transport properties of a triple-terminal Aharonov-Bohm interferometer are theoretically studied.By applying a Rashba spin-orbit coupling to a quantum dot locally, we find that remarkable spin polarization comesabout in the electron transport process with tuning the structure parameters, i.e., the magnetic flux or quantum dotlevels. When the quantum dot levels are aligned with the Fermi level, there only appear spin polarization in thisstructure by the presence of an appropriate magnetic flux. However, in absence of magnetic flux spin polarization andspin separation can be simultaneously realized with the adjustment of quantum dot levels, namely, an incident electronfrom one terminal can select a specific terminal to depart from the quantum dots according to its spin state.

关 键 词：quantum dot electron transport Rashba interaction 

分 类 号：O471.1[理学—半导体物理] O481[理学—物理]