Generation of Pure Bulk Valley Current in Graphene

被引：209

作者：

Jiang, Yongjin ^{[1
,2
,3
]}

Low, Tony ^{[4
]}

Chang, Kai ^{[3
,5
]}

Katsnelson, Mikhail I. ^{[6
]}

Guinea, Francisco ^{[7
]}

机构：

[1] Zhejiang Normal Univ, Ctr Stat & Theoret Condensed Matter Phys, Jinhua 321004, Peoples R China

[2] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China

[3] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China

[4] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

[5] Chinese Acad Sci, Inst Semicond, SKLSM, Beijing 100083, Peoples R China

[6] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands

[7] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MECHANICAL RESONATORS; POLARIZATION; TRANSPORT; SHEETS; MOS2;

D O I：

10.1103/PhysRevLett.110.046601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The generation of valley current is a fundamental goal in graphene valleytronics but no practical ways of its realization are known yet. We propose a workable scheme for the generation of bulk valley current in a graphene mechanical resonator through adiabatic cyclic deformations of the strains and a chemical potential in the suspended region. The accompanied strain gauge fields can break the spatial mirror symmetry of the problem within each of the two inequivalent valleys, leading to a finite valley current due to quantum pumping. An all-electrical measurement configuration is designed to detect the novel state with pure bulk valley currents. DOI: 10.1103/PhysRevLett.110.046601

引用

页数：5

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