Spin Filtering in a Rashba Electron Waveguide Induced by Edge Disorder  

作　　者：XIAO Xian-Bo LI Fei LIU Nian-Hua 肖贤波;李斐;刘念华(Institute for Advanced Study,Nanchang University,Nanchang 330031;School of Computer,Jiangxi University of Traditional Chinese Medicine,Nanchang 330004)

机构地区：[1]Institute for Advanced Study,Nanchang University,Nanchang 330031 [2]School of Computer,Jiangxi University of Traditional Chinese Medicine,Nanchang 330004

出　　处：《Chinese Physics Letters》2012年第8期209-212,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10832005;the China Postdoctoral Science Foundation under Grant No 20100481188;the Research Foundation of Jiangxi Education Department under Grant No GJJ12532.

摘　　要：We theoretically study the spin-dependent electron transport in a Rashba electron waveguide with rough edges,attached to ideal leads without spin-orbit interaction.The influence of the edge disorder on the charge and spin conductances is clarified by using the spin-resolved lattice Green function method.It is found that a spin-polarized current can be generated in the output lead and its spin polarization can be manipulated by varying the waveguide length.The underlying physics is attributed to the broken longitudinal symmetry and the spin-dependent quantum interference induced by the rough boundaries.Our results may provide a new method to design a spin filter without using magnetic materials or applying a magnetic field.

关 键 词：WAVEGUIDE POLARIZATION WAVEGUIDE 

分 类 号：TN2[电子电信—物理电子学]