物理学报2011，Vol.60Issue(7)：598-607,10.
微波作用下有直接隧穿量子点系统中的泵流特性
Properties of pumping current under microwave field applied to a quantum dot with over-dot tunneling
摘要
Abstract
The evolution-operator approach is applied to studying photon-electron pumping effects on a quantum dot connected to two magnetic leads in the presence of both via-dot and over-dot tunneling channels. It is found that a microwave field applied to the quantum dot may give rise to charge and spin pumpings at zero-bias voltage for asymmetric magnetic junctions. More interestingly, a pure spin current can be pumped for symmetric magnetic junctions in the anti-parallel magnetization configuration, providing a new scheme for the design of spin batteries.关键词
微波场/直接隧穿/量子点/泵流Key words
microwave field/over-dot tunneling/quantum dot/pumping current分类
数理科学引用本文复制引用
周运清,孔令民,王瑞,张存喜..微波作用下有直接隧穿量子点系统中的泵流特性[J].物理学报,2011,60(7):598-607,10.基金项目
国家自然科学基金（批准号：10947164和10947163）,浙江省教育厅项目（批准号：Y200908466,Y201018926）和浙江海洋学院项目和浙江省自然科学基金（批准号：Y6110250）资助的课题. （）
