Valley-polarized quantum transport generated by gauge fields in graphene

Mikkel Settnes, Jose H. Garcia, Stephan Roche

    Research output: Contribution to journalArticleResearchpeer-review

    19 Citations (Scopus)

    Abstract

    We report on the possibility to simultaneously generate in graphene a bulk valley-polarized dissipative transport and a quantum valley Hall effect by combining strain-induced gauge fields and real magnetic fields. Such unique phenomenon results from a ‘resonance/anti-resonance’ effect driven by the superposition/cancellation of superimposed gauge fields which differently affect time reversal symmetry. The onset of a valley-polarized Hall current concomitant to a dissipative valley-polarized current flow in the opposite valley is revealed by a e2 /h Hall conductivity plateau. We employ efficient linear scaling Kubo transport methods combined with a valley projection scheme to access valley-dependent conductivities and show that the results are robust against disorder.
    Original languageEnglish
    Article number031006
    Journal2D materials
    Volume4
    Issue number3
    DOIs
    Publication statusPublished - 1 Sep 2017

    Keywords

    • Graphene
    • Quantum transport
    • Strain deformations
    • Theory
    • Valley Hall effect

    Fingerprint Dive into the research topics of 'Valley-polarized quantum transport generated by gauge fields in graphene'. Together they form a unique fingerprint.

    Cite this