Axion topological insulators are fully described by surface charge and current densities satisfying integral equations solvable analytically for spheres and numerically for complex shapes.
Radiation of a short linear antenna above a topologically insulating half-space
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abstract
The topological magnetoelectric effect (TME) is a unique macroscopic manifestation of quantum states of matter possessing topological order and it is described by axion electrodynamics. In three-dimensional topological insulators, for instance, the axion coupling is of the order of the fine structure constant, and hence a perturbative analysis of the field equations is plenty justified. In this paper we use Green's function techniques to obtain time-dependent solutions to the axion field equations in the presence of a planar domain-wall separating two media with different topological order. We apply our results to investigate the radiation of a short linear antenna near the domain-wall.
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cond-mat.mtrl-sci 1years
2026 1verdicts
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Surface Variables Description of Axion Topological Materials
Axion topological insulators are fully described by surface charge and current densities satisfying integral equations solvable analytically for spheres and numerically for complex shapes.