Valley precession and valley polarization in graphene with inter-valley coupling

被引：15

作者：

Wu, Qing-Ping ^{[1
,2
]}

Liu, Zheng-Fang ^{[1
,2
]}

Chen, Ai-Xi ^{[1
,3
]}

Xiao, Xian-Bo ^{[4
]}

Zhang, Heng ^{[5
]}

Miao, Guo-Xing ^{[2
]}

机构：

[1] East China Jiaotong Univ, Dept Appl Phys, Nanchang 330013, Jiangxi, Peoples R China

[2] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[3] Zhejiang Sci Tech Univ, Dept Phys, Hangzhou 310018, Zhejiang, Peoples R China

[4] Jiangxi Univ Tradit Chinese Med, Sch Comp Sci, Nanchang 330004, Jiangxi, Peoples R China

[5] East China Jiaotong Univ, Sch Informat Engn, Nanchang 330013, Jiangxi, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2017年 / 29卷 / 39期

基金：

加拿大自然科学与工程研究理事会; 中国国家自然科学基金;

关键词：

graphene; valley precession; valley polarization; MOS2;

D O I：

10.1088/1361-648X/aa80cf

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We theoretically investigate the valley precession and valley polarization in graphene under inter-valley coupling. Our results show that the inter-valley coupling can induce valley polarization in graphene and also precess valleys in real space in a manner similar to the Rashba spin-orbit interaction rotating spins. Moreover, using strain modulation, we can achieve high valley polarization with large valley-polarized currents. These findings provide a new way to create and manipulate valley polarization in graphene.

引用

页数：9

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