Electromagnetic effects induced by time-dependent axion field

Abstract

We studied the dynamics of the so-called $\theta$-term, which exists in topological materials and is related to a hypothetical field predicted by Peccei-Quinn in particle physics, in a magnetic superlattice constructed using a topological insulator and two ferromagnetic insulators, where the ferromagnetic insulators had perpendicular magnetic anisotropies and different magnetic coercive fields. We examined a way to drive the dynamics of the $\theta$-term in the magnetic superlattice through changing the inversion symmetry (from an anti-parallel to a parallel magnetic configuration) using an external magnetic field. As a result, we found that unconventional electromagnetic fields, which are magnetic field-induced charge currents and vice versa, are generated by the nonzero dynamics of the $\theta$-term.

arXiv comment6 pages, 4 figures. To be published in PRB

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Cited by in corpus (11)

• Topological axion states in magnetic insulator MnBi${}_2$Te${}_4$ with the quantized magnetoelectric effect
• Axion Electrodynamics in Topological Materials
• Large dynamical axion field in topological antiferromagnetic insulator Mn${}_2$Bi${}_2$Te${}_5$
• Observation of the Axion quasiparticle in 2D MnBi${}_2$Te${}_4$
• Tunable dynamical magnetoelectric effect in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$ films
• Axion-matter coupling in multiferroics
• Nonlinear level attraction of cavity axion polariton in antiferromagnetic topological insulator
• Exploring self-consistency of the equations of axion electrodynamics in Weyl semimetals
• Dynamical magnetoelectric coupling in axion insulator thin films
• Axion mass in antiferromagnetic insulators
• Conserved laws and dynamical structure of axions coupled to photons