Cross-correlated responses of topological superconductors and superfluids.
We study nontrivial responses of topological superconductors and superfluids to the temperature gradient and rotation of the system. In two-dimensional gapped systems, the Strěda formula for the electric Hall conductivity is generalized to the thermal Hall conductivity. Applying this formula to the Majorana surface states of three-dimensional topological superconductors predicts cross-correlated responses between the orbital angular momentum and thermal polarization (entropy polarization). These results can be naturally related to the gravitoelectromagnetism description of three-dimensional topological superconductors and superfluids, analogous to the topological magnetoelectric effect in Z(2) topological insulators.
Correlated Electron Research Group (CERG), RIKEN-ASI, Wako, Japan.
Kentaro
K
Nomura
Shinsei
S
Ryu
Akira
A
Furusaki
Naoto
N
Nagaosa