Intra-valley Spin-triplet $p+ip$ Superconducting Pairing in Lightly Doped Graphene

Abstract

We analyze various possible superconducting pairing states and their relative stabilities in lightly doped graphene. We show that, when inter-sublattice electron-electron attractive interaction dominates and Fermi level is close to Dirac points, the system will favor intra-valley spin-triplet $p+\mathrm{i}p$ pairing state. Based on the novel pairing state, we further propose a scheme for doing topological quantum computation in graphene by engineering local strain fields and external magnetic fields.

5 pages, 2 figures were updated, 1 table, three references were added, minor revision, close to the published version