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arXiv · 2510.07916

Topological Magnon-Plasmon Hybrids

Tomoki Hirosawa·Pieter M. Gunnink·Alexander Mook
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Abstract

We study magnon-plasmon coupling in effectively two-dimensional stacks of van der Waals layers in the context of the band structure topology. Invoking the quasiparticle approximation, we show that the magnetic dipole coupling between the plasmons in a metallic layer and the magnons in a neighboring magnetic layer gives rise to a Berry curvature. As a result, the hybrid quasiparticles acquire an anomalous velocity, leading to intrinsic anomalous thermal Hall and spin-Nernst effects in ferromagnets and antiferromagnets. We propose magnetic layers supporting skyrmion crystals as a platform to realize chiral magnon-plasmon edge states, inviting the notion of topological magnon-plasmonics.

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Tomoki Hirosawa, Pieter M. Gunnink, Alexander Mook. 2025-10-09. Topological Magnon-Plasmon Hybrids. https://doi.org/10.1103/9csq-48k7

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