Chiral Phonon Transport Induced by Topological Magnons

Abstract

The plethora of recent discoveries in the field of topological electronic insulators has inspired a search for boson systems with similar properties. There are predictions that ferromagnets on a two-dimensional honeycomb lattice may host chiral edge magnons. In such systems, we theoretically study how magnons and phonons couple. We find topological magneto-polarons around the avoided crossings between phonons and topological magnons. Exploiting this feature along with our finding of Rayleigh edge phonons in armchair ribbons, we demonstrate the existence of chiral edge modes with a phononic character. We predict that these modes mediate a chirality in the coherent phonon response and suggest to measure this effect via elastic transducers. These findings reveal a possible approach towards heat management in future devices.

arXiv commentPublished version. 11 pages, 11 figures, including Supplementary Material

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Cited by in corpus (44)

• Topological Magnons: A Review
• Chiral phonons probed by X rays
• Nonreciprocal Dzyaloshinskii-Moriya magnetoacoustic waves
• Topological Magnon-Phonon Hybrid Excitations in Two-Dimensional Ferromagnets with Tunable Chern Numbers
• Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet
• Anomalous Thermal Hall Effect in an Insulating van der Waals Magnet VI3
• SU(3) Topology of Magnon-Phonon Hybridization in 2D Antiferromagnets
• Topological Magnetoelastic Excitations in Non-Collinear Antiferromagnets
• Backscattering immunity of dipole-exchange magnetostatic surface spin waves
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• Quantum topological phase transitions in skyrmion crystals
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• Controlling acoustic waves using magnetoelastic Fano resonances
• Magnonic Su-Schrieffer-Heeger Model in Honeycomb Ferromagnets
• Tunable topological magnon-polaron states and anomalous Hall phenomena in two-dimensional ferromagnetic insulators
• Topological spin-plasma waves
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• Magnon Polarons induced by a magnetic field gradient
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• Coherent strong-coupling of terahertz magnons and phonons in a Van der Waals antiferromagnetic insulator
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• Spin-dependent quasiparticle lifetimes in altermagnets
• Phonon mode splitting and phonon anomaly in multiband electron systems
• Theory of drift-enabled control in nonlocal magnon transport