Eur. Phys. J. B 76, 469-473 (2010)
https://doi.org/10.1140/epjb/e2010-00228-9

Pairing symmetry of superconducting graphene

¹ Dipartimento di Fisica e Astronomia, Università di Catania, Via S. Sofia, 64, 95123 Catania, Italy
² Scuola Superiore di Catania, Via S. Nullo, 5/i, 95123 Catania, Italy
³ CNISM, UdR Catania, 95123 Catania, Italy
⁴ INFN, Sez. Catania, 95123 Catania, Italy

Corresponding author: ^a giuseppe.angilella@ct.infn.it

Received: 27 April 2010
Revised: 21 June 2010
Published online: 20 July 2010

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.