%0 Journal Article
%T Effect of magnetic field on the transmission properties of electrons in a four-terminal quantum waveguide<br>磁场对四端量子波导中电子输运性质的影响
%A Gao Feng
%A Wang Yan
%A You Kai-Ming
%A Yao Ling-Jiang
%A <br>高峰
%A 王艳
%A 游开明
%A 姚凌江
%J 物理学报
%D 2006
%I 
%X We investigate the quantum-mechanical transmission of electrons in a four-terminal quantum waveguide (FTQW) subjected to an inhomogeneous magnetic field perpendicular to the FTQW plane with the use of the mode-matching technique. An electron incident through one channel of the waveguide can travel into the other three channels in the quantum ballistic regime. The results show that in zero field the transmission coefficients in two channels perpendicular to the main wire are of similar behavior, but different from that of the channel parallel to the main wire. However, in an applied magnetic field, the transmission coefficients in two channels perpendicular to the main wire exhibit quite difference from each other and depend sensitively on geometric parameters. When different magnetic configurations are applied in the structure, the transmission exhibits various patterns such as step drop, wide valley, sharp peak, and so on. Our results show that one may control the transmission property of the FTQW to match practical requirements in devices by adjusting magnetic configurations or structural parameters.
%K electronic transport
%K mesoscopic systems
%K magnetic effects<br>电子输运
%K 介观体系
%K 磁效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1A9569B373841FE1&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=B31275AF3241DB2D&sid=C7D3DB6F0D2A7B0F&eid=88F9E129B8F48F79&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=43