Possible Realization of non-BCS type Superconductivity in Graphene

TL;DR

This paper proposes a non-BCS superconductivity mechanism in gapped graphene induced by gauge fields from non-uniform hopping, which does not require pairing and could be observed in cold atomic gases.

Contribution

It introduces a novel non-pairing superconductivity mechanism in graphene driven by gauge fields from non-uniform hopping.

Findings

Superconductivity can arise without pairing in gapped graphene.

Critical temperature estimated via BKT transition.

Potential realization in ultra cold atomic gases.

Abstract

We show that the gauge field induced due to non-uniform hopping, in gapped graphene, can give rise to a non-BCS type of superconductivity. Unlike the conventional mechanisms, this superconductivity phenomena does not require any pairing. We estimate the critical temperature for superconducting-to-normal transition via Berezinskii-Kosterlitz-Thouless mechanism. Possibility of observing the same in ultra cold atomic gases is also pointed out.