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arXiv · 1108.5054

Cross-Correlated Responses of Topological Superconductors and Superfluids

Kentaro Nomura·Shinsei Ryu·Akira Furusaki·Naoto Nagaosa
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Abstract

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 ${\mathbb{Z}}_2$ topological insulators.

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Kentaro Nomura, Shinsei Ryu, Akira Furusaki, Naoto Nagaosa. 2011-11-07. Cross-Correlated Responses of Topological Superconductors and Superfluids. https://doi.org/10.1103/physrevlett.108.026802

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