Topological electric current from time-dependent elastic deformations in graphene

TL;DR

This paper proposes a method to generate edge charge currents in gapped graphene through time-dependent strain, linking it to the valley Hall effect, and preserving time-reversal symmetry.

Contribution

It introduces a novel way to induce edge currents in graphene via dynamic strain, connecting it to the valley Hall response without breaking time-reversal symmetry.

Findings

Edge charge current can be induced by time-dependent strain in gapped graphene.

The induced current originates from the same mechanism as the valley Hall effect.

The method preserves time-reversal symmetry in the system.

Abstract

We show the possibility of inducing an edge charge current by applying time-dependent strain in gapped graphene samples preserving time reversal symmetry. We demonstrate that this edge current has the same origin as the valley Hall response known to exist in the system.