Transport through dynamic pseudo-gauge fields and snake states in a Corbino geometry

TL;DR

This paper explores how strain-induced pseudo-magnetic and electric fields in a graphene Corbino disk can generate snake states and a pseudo-Hall effect, enabling novel transport phenomena without external voltages.

Contribution

It introduces a Corbino geometry setup to detect pseudo-fields and predicts dynamic strain effects leading to charge currents via pseudo-Hall effects.

Findings

Pseudo-magnetic field changes sign six times with angle.

Snake states connect inner and outer contacts.

AC pseudo-electric field induces a net charge current.

Abstract

We propose a Corbino-disk geometry of a graphene membrane under out-of-plane strain deformations as a convenient path to detect pseudo-magnetic and electric fields via electronic transport. The three-fold symmetric pseudo-magnetic field changes sign six times as function of angle, leading to snake states connecting the inner and outer contacts and to nearly quantized transport. For dynamical strain obtained upon AC gating, the system supports an AC pseudo-electric field which, in the presence of the pseudo-magnetic field, produces a net electronic charge current in the absence of an external voltage, via a pseudo-Hall effect.