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.
@article{arxiv.2510.07916,
title = {Topological Magnon-Plasmon Hybrids},
author = {Tomoki Hirosawa and Pieter M. Gunnink and Alexander Mook},
journal= {arXiv preprint arXiv:2510.07916},
year = {2026}
}