Work

Axion Instability and Nonlinear Electromagnetic Effect

Year: 2019

Type: article

Abstract: We investigate the instability due to dynamical axion field near the topological phase transition of insulators. We first point out that the amplitude of dynamical axion field is bounded for magnetic insulators in general, which suppresses the axion instability. Near the topological phase transition, however, the axion field may have a large fluctuation, which decreases the critical electric field for the instability and increases the axion induced magnetic flux density. Using two different model Hamiltonians, we report the electromagnetic response of the axion field in details.

Source: Journal of the Physical Society of Japan

DOI: 10.7566/jpsj.88.024402

Authors: Tatsushi Imaeda, Yuki Kawaguchi, Yukio Tanaka, Masatoshi Sato

Institutions: Nagoya University, Kyoto University, Yukawa Institute for Theoretical Physics

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Awards: Quantum orders caused by symmetry and correlation, Topological structures and transport phenomena in a spin-orbit coupled system, G5007900308