"Topological field theory and thermal responses of interacting topological superconductors"

Zhong Wang: Xiao-Liang Qi, and Shou-Cheng Zhang ; Phys. Rev. B, 07/28/11.

Additional Authors: Xiao-Liang Qi, and Shou-Cheng Zhang

Abstract:

We investigate the three-dimensional, time-reversal invariant topological superconductors with generic interaction by their response to external fields. The first description is a gravitational topological field theory, which gives a Z2 classification of topological superconductors, and predicts a half quantized thermal Hall effect on the surface. The second description introduces an s-wave proximity pairing field on the surface, and the associated topological defects give an integer Z classification of the topological superconductors.