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MA: Fachverband Magnetismus
MA 37: Skyrmions III
MA 37.2: Talk
Thursday, March 21, 2024, 09:45–10:00, EB 301
Topological Magnon-Plasmon-Polaritons in Ferromagnets, Antiferromagnets and Skyrmion Crystals — Tomoki Hirosawa1, Pieter Gunnink2, and •Alexander Mook2 — 1Aoyama Gakuin University, Japan — 2Johannes Gutenberg University Mainz
The strong coupling of magnetic excitations with electromagnetic waves and other collective modes in the solid state offers exciting possibilities for magnonic quantum hybrid systems and cavity control of material properties. The recent advent of two-dimensional materials has sparked interest in the hybridization of magnons with plasmons [1-3], which can support topologically non-trivial properties [4,5].
Here, we explore the topological properties of magnon(-plasmon) polaritons with a strong focus on effectively two-dimensional ferromagnets, antiferromagnets, and skyrmion crystals. We show that the anticrossing can give rise to a finite quasiparticle Berry curvature and a topological gap. We discuss the possibility of chiral edge states and cavity-engineered thermal Hall and spin Nernst transport.
[1] Ghosh et al., Phys. Rev. B 107, 195302 (2023), [2] Dyrdał et al., Phys. Rev. B 108, 045414 (2023), [3] Costa et al., Nano Lett. 23, 10, 4510-4515 (2023), [4] Okamoto et al., Phys. Rev. B 102, 064419 (2020), [5] Efimkin, Kargarian, Phys. Rev. B 104, 075413 (2021),
Keywords: Thermal Hall and Spin Nernst Effects; Magnon; Skyrmion; Plasmon; Polariton