SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 16: Magnonics

MA 16.2: Talk

Tuesday, March 28, 2023, 09:45–10:00, HSZ 403

Topological Hybrids of Magnons and Magnon Bound Pairs — Alexander Mook¹, •Rhea Hoyer¹, Jelena Klinovaja², and Daniel Loss² — ¹Johannes Gutenberg-University, Mainz, Germany — ²University of Basel, Basel, Switzerland

We employ anisotropic and spin-nonconserving Heisenberg models on Bravais lattices to predict the existence of topological quantum spin excitations in ferromagnets. We show that a hybridization of a single magnon and a two-magnon bound state can lead to topological spectral gaps that support quantum-Hall-like edge excitations. Such topological chiral hybrids of magnons and magnon pairs are a quantum phenomenon that vanishes in the classical limit and goes beyond the established theory of magnon topology.

Reference: Mook, Hoyer, Klinovaja, Loss, arXiv:2203.12374.