title: Superconducting states of pure and doped graphene.
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.
authors.affiliation: Physics Department, Boston University, 590 Commonwealth Ave., Boston, Massachusetts 02215, USA.
authors.forename: Bruno
authors.initials: B
authors.lastname: Uchoa
authors.forename: A H
authors.initials: AH
authors.lastname: Castro Neto