Electromagnetic Response of Spinful Majorana Fermions

Author:

Kobayashi Shingo1ORCID,Sato Masatoshi2

Affiliation:

1. RIKEN Center for Emergent Matter Science , Wako, Saitama 351-0198, Japan

2. Yukawa Institute for Theoretical Physics, Kyoto University , Kyoto 606-8502 , Japan

Abstract

Abstract A remarkable feature of topological superconductors is the emergence of Majorana fermions in electron systems. Whereas the emergent Majorana fermions share the self-antiparticle property with Majorana fermions in particle physics, they may have essentially different electromagnetic properties. In this paper, we discuss the electromagnetic response of spinful Majorana fermions in topological superconductors. We present a general theory of the electromagnetic response of spinful Majorana fermions in topological superconductors and clarify how the pairing symmetry is encoded in the electromagnetic response. As an application, we predict the sublattice-dependent dipole (Ising)-type magnetic response of corner Majorana fermions in iron-based superconductors.

Funder

Japan Society for the Promotion of Science

Japan Science and Technology Agency

Publisher

Oxford University Press (OUP)

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