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arXiv · 2506.11834

Magnon-plasmon coupling mediated by linear magnetoelectric effect in two-dimensional crystals with Dzyaloshinskii-Moriya interaction

Wojciech Rudziński·Mirali Jafari·Józef Barnaś·Anna Dyrdał
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Abstract

Recently, one can observe a renewed interest in coupling of spin waves (magnons) and collective charge oscillations (plasmons), especially in two-dimensional systems. Several mechanisms of the magnon-plasmon hybridization in ferromagnetic and antiferromagnetic systems have been proposed. Here, we consider another mechanism of magnon-plasmon hybridization, which is based on the linear magnetoelectric interaction. As a specific system we consider a monolayer of vanadium-based diselenide with perpendicular easy-axis magnetic anisotropy and Dzialoshinskii-Moriya interaction. The derived parameter of magnon-plasmon coupling is proportional to the magnetoelectric constant. Assuming for this constant an adequate experimental value, we calculate dispersion relations of the hybridized magnon-plasmon mods. Moreover, we also show that an external electric field normal to the layer (due to a gate voltage) can be used as a tool to tune the magnon modes and this way also hybridized magnon-plasmon coupling. A specific case of magnon-plasmon coupling based on tuning Dzialoshinskii-Moriya interaction is also considered.

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Wojciech Rudziński, Mirali Jafari, Józef Barnaś, Anna Dyrdał. 2025-06-13. Magnon-plasmon coupling mediated by linear magnetoelectric effect in two-dimensional crystals with Dzyaloshinskii-Moriya interaction. https://doi.org/10.1103/nnft-yhmw

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