Spin pumping through magnetic impurity effect  

作　　者：邓伟胤 盛利 邢定钰 

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University [2]Collaborative Innovation Center of Advanced Microstructures, Nanjing University

出　　处：《Chinese Physics B》2015年第8期513-516,共4页中国物理B（英文版）

基　　金：supported by the State Key Program for Basic Research of China(Grant Nos.2015CB921202,2014CB921103,2011CB922103,and 2010CB923400);the National Natural Science Foundation of China(Grant Nos.11225420,11174125,and 91021003);the Priority Academic Program Development of Higher Education Institutions of Jiangsu Province,China

摘　　要：We propose a simple adiabatic quantum spin pump to generate pure spin current. The spin pump is driven by an ac gate voltage and a time-dependent magnetic impurity potential. It is found that the total pumped spin per cycle exhibits oscillations, whose magnitude decays exponentially with changing strength of the impurity potential. The proposed method may be useful for spintronic applications.We propose a simple adiabatic quantum spin pump to generate pure spin current. The spin pump is driven by an ac gate voltage and a time-dependent magnetic impurity potential. It is found that the total pumped spin per cycle exhibits oscillations, whose magnitude decays exponentially with changing strength of the impurity potential. The proposed method may be useful for spintronic applications.

关 键 词：PUMPING pure spin current magnetic impurity 

分 类 号：O441[理学—电磁学]