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arXiv · 2412.02284

Optical detection of 4-spin chiral interaction in a 2D honeycomb ferrimagnet

Bektur Murzaliev·Mikhail Katsnelson·Mikhail Titov
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Abstract

Broken inversion symmetry of magnetic lattice is normally described by Lifshitz invariants in micromagnetic energy functional. Three exceptions are the lattices with T$_\textrm{d}$, C$_\textrm{3h}$ and D$_\textrm{3h}$ point group symmetries. The inversion symmetry breaking of the corresponding magnets is described by more complex 4-spin chiral invariants that cannot be related to Dzyaloshinskii-Moriya interaction. Experimental detection of 4-spin chiral interactions is an important task that has yet to be performed. We propose that the 4-spin chiral interaction can be probed by energy selective magnon relaxation in two-dimensional ferromagnet Fe$_{3}$GeTe$_{2}$ that possess D$_\textrm{3h}$ point group symmetry.

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Bektur Murzaliev, Mikhail Katsnelson, Mikhail Titov. 2024-12-03. Optical detection of 4-spin chiral interaction in a 2D honeycomb ferrimagnet. https://arxiv.org/abs/2412.02284

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