Superconducting states of pure and doped graphene
arXiv:cond-mat/0608515 · doi:10.1103/PhysRevLett.98.146801
Abstract
We study the superconducting phases of the two-dimensional honeycomb lattice of graphene. We find two spin singlet pairing states, s-wave and an exotic $p+ip$ that is possible because of the special structure of the honeycomb lattice. At half filling, the $p+ip$ phase is gapless and superconductivity is a hidden order. We discuss the possibility of a superconducting state in metal coated graphene.
4 pages, 6 figures