Generation of pure bulk valley current in graphene

Yongjin Jiang, Tony Low, Kai Chang, Mikhail I. Katsnelson, Francisco Guinea

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number046601
JournalPhysical review letters
Volume110
Issue number4
DOIs
StatePublished - Jan 23 2013
Externally publishedYes

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