Field-assisted spin-polarized electron transport through a single quantum well with spin-orbit coupling  

作　　者：丁秀欢 张存喜 王瑞 周运清 孔令民 

机构地区：[1]Department of Mathematics,Zhejiang Ocean University [2]Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education,Jilin University [3]Department of Physics,Zhejiang Ocean University

出　　处：《Chinese Physics B》2012年第3期389-394,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 11147173 and 61106052);the Zhejiang Education Department, China (Grant No. Y201018926 and Y200908466);the Basic Research Foundation of Jilin University,China (Grant No. 93K172011K02);the Basic Research Foundation of Zhejiang Ocean University, the Nature Science Foundation of Zhejiang Province, China (Grant No. 1047172);the Open Foundation from Ocean Fishery Science and Technology in the Most Important Subjects of Zhejiang, China(No. 20110105)

摘　　要：We have investigated theoretically the field-driven electron transport through a single-quantum-well semiconductor heterostructure with spin-orbit coupling. The splitting of the asymmetric Fano-type resonance peaks due to the Dresselhaus spin-orbit coupling is found to be highly sensitive to the direction of the incident electron. The splitting of the Fano-type resonance induces the spin-polarization dependent electron current. The location and the line shape of the Fano-type resonance can be controlled by adjusting the energy and the direction of the incident electron, the oscillation frequency, and the amplitude of the external field. These interesting features may be used to devise tunable spin filters and realize pure spin transmission currents.We have investigated theoretically the field-driven electron transport through a single-quantum-well semiconductor heterostructure with spin-orbit coupling. The splitting of the asymmetric Fano-type resonance peaks due to the Dresselhaus spin-orbit coupling is found to be highly sensitive to the direction of the incident electron. The splitting of the Fano-type resonance induces the spin-polarization dependent electron current. The location and the line shape of the Fano-type resonance can be controlled by adjusting the energy and the direction of the incident electron, the oscillation frequency, and the amplitude of the external field. These interesting features may be used to devise tunable spin filters and realize pure spin transmission currents.

关 键 词：Fano resonance Floquet channel spin-orbit coupling 

分 类 号：O471.1[理学—半导体物理]