Journal
PHYSICAL REVIEW B
Volume 79, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.214526
Keywords
Fermi surface; superconductivity; surface states
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We report intimate relations between topological properties of full-gapped spin-triplet superconductors with time-reversal invariance and the Fermi surface topology in the normal states. An efficient method to calculate the Z(2) invariants and the winding number for the spin-triplet superconductors is developed and connections between these topological invariants and the Fermi surface structures in the normal states are pointed out. We also obtain a correspondence between the Fermi surface topology and gapless surface states in the superconducting states. The correspondence is inherent to spin-triplet superconductivity.
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