Spin-dependent transport through a quantum wire on a graphene surface

被引：9
|
作者：
Yang, Fu-Bin [1 ,2 ]
Cheng, Yan [1 ]
Liu, Fu-Ti [1 ]
Chen, Xiang-Rong [1 ,3 ]
机构：
[1] Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610064, Peoples R China
[2] Sichuan Normal Univ, Chengdu Coll, Dept Math, Chengdu 611745, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 01期
基金：
中国国家自然科学基金;
关键词：
CONDUCTANCE; SYSTEMS;
D O I：
10.1063/1.4773913
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electron transport through a quantum wire coupled with ferromagnetic leads on a graphene sheet is studied by the Keldysh nonequilibrium Green's function method. We investigate the dependence of the transport properties on the wire-graphene coupling strength in detail. It is found that the peaks of the density of states fade away and the current is suppressed with the increasing wire-graphene coupling strength. The spin polarized strength of the two leads can effectively suppress the current and the transmission. The results obtained provide valuable theoretical guidance to the spintronics experiment. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773913]
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页数：5
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