Spin-Polarized Currents in Double Quantum Dots with Rashba Spin-Orbit Interactions  

作　　者：LI Zhen-Shan PAN Hui LÜRong 李振山;潘晖;吕嵘(Department of Physics and State Key Laboratory of Software Development Environment,Beihang University,Beijing 100191;Department of Physics,Tsinghua University,Beijing 100084)

机构地区：[1]Department of Physics and State Key Laboratory of Software Development Environment,Beihang University,Beijing 100191 [2]Department of Physics,Tsinghua University,Beijing 100084

出　　处：《Chinese Physics Letters》2013年第8期132-135,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 Nos 11174022 and 11274195;the NCET Program of MOE under Grant No NCET-11-0774;the Fundamental Research Funds for the Central Universities,the National Basic Research Program of China under Grants No 2011CB606405;the State Key Laboratory of Software Development Environment under Grant No SKLSDE-2013ZX-21.

摘　　要：We propose a new scheme of realizing spin-polarized currents in a double quantum dot system.In the presence of Rashba spin-orbit coupling interactions and different Zeeman splittings of each quantum dot,the currents are spin-polarized.The polarization can be controlled by tuning the strength of Rashba spin-orbit coupling and external magnetic fields,which can produce nearly 100%spin-polarized currents.Furthermore,we explain and analyze the mechanism of the strongly spin-polarized currents.Lastly we give two phase diagrams to display our results.

关 键 词：POLARIZED QUANTUM RASHBA 

分 类 号：O46[理学—电子物理学]