Valley-Polarized Quantum Transport Generated by Gauge Fields in Graphene
Abstract
We report on the possibility to simultaneously generate in graphene a {\it bulk valley-polarized dissipative transport} and a {\it 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 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.
Cite
@article{arxiv.1705.09085,
title = {Valley-Polarized Quantum Transport Generated by Gauge Fields in Graphene},
author = {Mikkel Settnes and José Hugo García and Stephan Roche},
journal= {arXiv preprint arXiv:1705.09085},
year = {2018}
}
Comments
2D Materials (accepted for publication)