Wavefunction topology of two-dimensional time-reversal symmetric superconductors

Details Wavefunction topology of two-dimensional time-reversal symmetric superconductors Wavefunction topology of two-dimensional time-reversal symmetric superconductors

2009-10-05

arxiv.org/abs/0910.0696v2

J. Low Temp. Phys. , 160, 12 (2010)

Physics

Condensed Matter

Superconductivity

only the Introduction has been modified from v1

Scientific paper

10.1007/s10909-010-0168-5

We discuss the topology of the wavefunctions of two-dimensional time-reversal symmetric superconductors. We consider (a) the planar state, (b) a system with broken up-down reflection symmetry, and (c) a system with general spin-orbit interaction. We show explicitly how the relative sign of the order parameter on the two Fermi surfaces affects this topology, and clarify the meaning of the $Z_2$ classification for these topological states.

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