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Strongly coupled magnon–phonon dynamics in a single nanomagnet

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  • Cassidy Berk

    (School of Engineering, University of California Santa Cruz)

  • Mike Jaris

    (School of Engineering, University of California Santa Cruz)

  • Weigang Yang

    (School of Engineering, University of California Santa Cruz)

  • Scott Dhuey

    (Molecular Foundry, University of California Berkeley)

  • Stefano Cabrini

    (Molecular Foundry, University of California Berkeley)

  • Holger Schmidt

    (School of Engineering, University of California Santa Cruz)

Abstract

Polaritons are widely investigated quasiparticles with fundamental and technological significance due to their unique properties. They have been studied most extensively in semiconductors when photons interact with various elementary excitations. However, other strongly coupled excitations demonstrate similar dynamics. Specifically, when magnon and phonon modes are coupled, a hybridized magnon–phonon quasiparticle can form. Here, we report on the direct observation of coupled magnon–phonon dynamics within a single thin nickel nanomagnet. We develop an analytic description to model the dynamics in two dimensions, enabling us to isolate the parameters influencing the frequency splitting. Furthermore, we demonstrate tuning of the magnon–phonon interaction into the strong coupling regime via the orientation of the applied magnetic field.

Suggested Citation

  • Cassidy Berk & Mike Jaris & Weigang Yang & Scott Dhuey & Stefano Cabrini & Holger Schmidt, 2019. "Strongly coupled magnon–phonon dynamics in a single nanomagnet," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10545-x
    DOI: 10.1038/s41467-019-10545-x
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    Cited by:

    1. Steffen Wittrock & Salvatore Perna & Romain Lebrun & Katia Ho & Roberta Dutra & Ricardo Ferreira & Paolo Bortolotti & Claudio Serpico & Vincent Cros, 2024. "Non-hermiticity in spintronics: oscillation death in coupled spintronic nano-oscillators through emerging exceptional points," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. Thomas W. J. Metzger & Kirill A. Grishunin & Chris Reinhoffer & Roman M. Dubrovin & Atiqa Arshad & Igor Ilyakov & Thales V. A. G. Oliveira & Alexey Ponomaryov & Jan-Christoph Deinert & Sergey Kovalev , 2024. "Magnon-phonon Fermi resonance in antiferromagnetic CoF2," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    3. Jun Cui & Emil Viñas Boström & Mykhaylo Ozerov & Fangliang Wu & Qianni Jiang & Jiun-Haw Chu & Changcun Li & Fucai Liu & Xiaodong Xu & Angel Rubio & Qi Zhang, 2023. "Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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