On the Electromagnetic Response of Topological Superconductors

Date

2021/09/24(Fri)15:00~16:00

Venue

Online (Zoom)

Speaker

Prof. Masatoshi Sato (YITP)

Language

English

URL

Contact

ryokokur-AT-poat.kek.jp


概要

We resolve several puzzles related to the electromagnetic response of topological superconductors in 3+1 dimensions. In particular we show by an analytical calculation that the interface between a topological and normal superconductor does not exhibit any quantum Hall effect as long as time reversal invariance is preserved. We contrast this with the analogous case of a topological insulator to normal insulator interface. The difference is that in the topological insulator the electromagnetic vector potential couples to a vector current in a theory with a Dirac mass, while in the superconductor a pair of Weyl fermions are gapped by Majorana masses and the electromagnetic vector potential couples to their axial currents.

Release date 2021/08/18 Updated 2024/06/26