The quantum valley Hall effect in proximity-induced superconducting graphene: an experimental window for deconfined quantum criticality

TL;DR

This paper proposes that inducing superconductivity in graphene can enable the experimental observation of the quantum valley Hall effect and aspects of deconfined quantum criticality through edge valley pseudospin accumulation and vortex core structures.

Contribution

It introduces a novel experimental approach to observe quantum valley Hall effect and deconfined quantum criticality in proximity-induced superconducting graphene.

Findings

Supercurrent causes valley pseudospin accumulation at edges.

Vortex core structure offers insights into quantum criticality.

Proximity-induced superconductivity enables new quantum Hall observations.

Abstract

We argue that by inducing superconductivity in graphene via the proximity effect, it is possible to observes the "quantum valley Hall effect". In the presence of magnetic field, supercurrent causes "valley pseudospin" to accumulate at the edges of the superconducting strip. This, and the structure of the superconducting vortex core, provide possibilities to experimentally observe aspects of the "deconfined quantum criticality".