Controllable tuning of the spin-dependent transport in the graphene sheet

被引：0
|
作者：
Liu, Chun Mei [1 ]
Li, Zhuan [1 ]
Wang, Jun Ling [1 ]
Zhao, Li Li [1 ]
Wang, Yang [1 ]
机构：
[1] Acad Armored Forces Engn, Dept Fundamental Courses, Beijing 100072, Peoples R China
来源：
MECHANICAL COMPONENTS AND CONTROL ENGINEERING III | 2014年 / 668-669卷
关键词：
graphene sheet; asymmetric contacts; spin-dependent electronic transport; NANORIBBONS;
D O I：
10.4028/www.scientific.net/AMM.668-669.8
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Based on the non-equilibrium Green's function in combination with the density-functional theory, the spin-dependent transport in the short graphene nanoribbon (graphene sheet) asymmetrically coupled to the electrodes of Au chains is investigated. It is found that a fully spin-polarized current (close to 100%) can be produced at the output port. The physics underlying attributes to the spatially separated edge states of the sheet caused by asymmetric contacts. Especially, the current's spin polarized direction can be tuned simply by changing the contact locations of the electrodes to the graphene sheet.
引用
收藏
页码：8 / 11
页数：4
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