Magnon-phonon interactions in magnetic insulators

Journal article (2019)

Authors

S.D. Streib QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Nicolas Vidal-Silva Universidad de Santiago de Chile
Ka Shen Beijing Normal University
G.E. Bauer Kavli institute of nanoscience Delft, QN/Bauer Group - AS , Beijing Normal University, Tohoku University
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2019 S.D. Streib, Nicolas Vidal-Silva, Ka Shen, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevB.99.184442
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Published Date

2019

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

Abstract

We address the theory of magnon-phonon interactions and compute the corresponding quasiparticle and transport lifetimes in magnetic insulators, with a focus on yttrium iron garnet at intermediate temperatures from anisotropy- and exchange-mediated magnon-phonon interactions, the latter being derived from the volume dependence of the Curie temperature. We find in general weak effects of phonon scattering on magnon transport and the Gilbert damping of the macrospin Kittel mode. The magnon transport lifetime differs from the quasiparticle lifetime at shorter wavelengths.

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