Spin-polarized current in double quantum dots

作     者：李爱仙 段素青 

作者机构：Graduate School of China Academy of Engineering Physics Institute of Applied Physics and Computational Mathematics 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2012年第21卷第11期

页      面：383-387页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 10874020 and 11174042) the National Basic Research Program of China (Grants No. 2011CB922204) the CAEP,China (Grant No. 2011B0102024) the SRF for ROCS,SEM,China 

主　　题：resonant tunnelling spin-polarized current spin filter double quantum dots 

摘      要：We analyze the transport through asymmetric double quantum dots with an inhomogeneous Zeeman splitting in the presence of crossed dc and ac magnetic fields. A strong spin-polarized current can be obtained by changing the dc magnetic field. It is mainly due to the resonant tunnelling. But for the ferromagnetic right electrode, the electron spin resonance also plays an important role in transport. We show that the double quantum dots with three-level mixing under crossed dc and ac magnetic fields can act not only as a bipolar spin filter but also as a spin inverter under suitable conditions.