Spin transport properties in double quantum rings connected in series  

作　　者：杜坚 王素新 潘江洪 

机构地区：[1]Department of Physics Hebei Normal College for Nationalities [2]College of Physics and Technology Guangxi Normal University

出　　处：《Journal of Semiconductors》2011年第2期1-5,共5页半导体学报（英文版）

基　　金：Project supported by the Natural Foundation of the Bureau of Education of Hebei Province,China(No.Z2008103)

摘　　要：A new model of metal/semiconductor/metal double-quantum-ring connected in series is proposed and the transport properties in this model are theoretically studied. The results imply that the transmission coefficient shows periodic variations with increasing semiconductor ring size. The effects of the magnetic field and Rashba spin-orbit interaction on the transmission coefficient for two kinds of spin state electrons are different. The number of the transmission coefficient peaks is related to the length ratio between the upper arm and the half circumference of the ring. In addition, the transmission coefficient shows oscillation behavior with enhanced external magnetic field, and the corresponding average value is related to the two leads＇ relative position.A new model of metal/semiconductor/metal double-quantum-ring connected in series is proposed and the transport properties in this model are theoretically studied. The results imply that the transmission coefficient shows periodic variations with increasing semiconductor ring size. The effects of the magnetic field and Rashba spin-orbit interaction on the transmission coefficient for two kinds of spin state electrons are different. The number of the transmission coefficient peaks is related to the length ratio between the upper arm and the half circumference of the ring. In addition, the transmission coefficient shows oscillation behavior with enhanced external magnetic field, and the corresponding average value is related to the two leads＇ relative position.

关 键 词：transmission coefficient double quantum rings Rashba spin-orbit interaction 

分 类 号：O471.1[理学—半导体物理]