Topological invariants for the Fermi surface of a time-reversal-invariant superconductor
Topological invariants for the Fermi surface of a time-reversal-invariant superconductor
A time reversal invariant (TRI) topological superconductor has a full pairing gap in the bulk and topologically protected gapless states on the surface or at the edge. In this paper, we show that in the weak pairing limit, the topological quantum number of a TRI superconductor can be completely determined …