%0 Journal Article
%T Magnetic polarization currents in parallel-coupled double-quantum-dot devices<br>嵌入平行量子点的非平衡介观环路的极化电流
%A Chen Xiong-Wen
%A He Da-Jiang
%A Wu Shao-Quan
%A Song Ke-Hui
%A <br>谌雄文
%A 贺达江
%A 吴绍全
%A 宋克慧
%J 物理学报
%D 2006
%I 
%X We theoretically study the properties of the magnetic polarization currents (MPC) in parallel-coupled double-quantum-dot devices by means of the two-impurity Anderson Hamiltonian and Green functions. It is shown that at zero temperature, the Kondo effect of the system becomes weaker with the increase of the coupling strength. At low temperature, by varying some conditions such as temperature and bias voltage, the direction and magnitude of MPC can be changed, which implies that the magnetic states of the device can be mode up-, non- or down-polarized.
%K magnetic polarization currents
%K coupled quantum dot
%K Kondo effect
%K temperature effect<br>极化电流
%K 耦合量子点
%K Kondo效应
%K 温度效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=68BA09D5F6084157&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=5D311CA918CA9A03&sid=CE1742A04433B879&eid=4D6D023B0B861932&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=20