Topological invariants of time reversal invariant superconductors

Details Topological invariants of time reversal invariant superconductors Topological invariants of time reversal invariant superconductors

2006-08-02

arxiv.org/abs/cond-mat/0608064v1

Physics

Condensed Matter

Superconductivity

brief note on topological invariants for superconductors

Scientific paper

The topological invariants of gapped time reversal invariant lattice
superconductors are studied by mapping the superconducting mean field
Hamiltonian to a Bloch Hamiltonian. There is a single $Z_2 $ invariant in two
dimensions and four such invariants in three dimensions. We briefly discuss the
properties of states with non-trivial topological invariants.

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