Pairing symmetry of superconducting graphene

TL;DR

This paper explores the potential pairing symmetries in superconducting graphene, analyzing their phase diagram and local density of states to identify signatures of unconventional superconductivity.

Contribution

It derives possible pairing symmetries for graphene and discusses their phase diagram, providing theoretical insights into unconventional superconductivity in graphene.

Findings

Possible pairing symmetries identified

Phase diagram of superconducting states analyzed

LDOS calculations suggest experimental signatures

Abstract

The possibility of intrinsic superconductivity in alkali-coated graphene monolayers has been recently suggested theoretically. Here, we derive the possible pairing symmetries of a carbon honeycomb lattice and discuss their phase diagram. We also evaluate the superconducting local density of states (LDOS) around an isolated impurity. This is directly related to scanning tunneling microscopy experiments, and may evidence the occurrence of unconventional superconductivity in graphene.