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Magnon-phonon Fermi resonance in antiferromagnetic CoF2

Author

Listed:
  • Thomas W. J. Metzger

    (Radboud University)

  • Kirill A. Grishunin

    (Radboud University)

  • Chris Reinhoffer

    (University of Cologne)

  • Roman M. Dubrovin

    (Russian Academy of Sciences)

  • Atiqa Arshad

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Igor Ilyakov

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Thales V. A. G. Oliveira

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Alexey Ponomaryov

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Jan-Christoph Deinert

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Sergey Kovalev

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Roman V. Pisarev

    (Russian Academy of Sciences)

  • Mikhail I. Katsnelson

    (Radboud University)

  • Boris A. Ivanov

    (Radboud University)

  • Paul H. M. Loosdrecht

    (University of Cologne)

  • Alexey V. Kimel

    (Radboud University)

  • Evgeny A. Mashkovich

    (University of Cologne)

Abstract

Understanding spin-lattice interactions in antiferromagnets is a critical element of the fields of antiferromagnetic spintronics and magnonics. Recently, coherent nonlinear phonon dynamics mediated by a magnon state were discovered in an antiferromagnet. Here, we suggest that a strongly coupled two-magnon-one phonon state in this prototypical system opens a novel pathway to coherently control magnon-phonon dynamics. Utilizing intense narrow-band terahertz (THz) pulses and tunable magnetic fields up to μ0Hext = 7 T, we experimentally realize the conditions of magnon-phonon Fermi resonance in antiferromagnetic CoF2. These conditions imply that both the spin and the lattice anharmonicities harvest energy from the transfer between the subsystems if the magnon eigenfrequency fm is half the frequency of the phonon 2fm = fph. Performing THz pump-infrared probe spectroscopy in conjunction with simulations, we explore the coupled magnon-phonon dynamics in the vicinity of the Fermi-resonance and reveal the corresponding fingerprints of nonlinear interaction facilitating energy exchange between these subsystems.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49716-w
    DOI: 10.1038/s41467-024-49716-w
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    References listed on IDEAS

    as
    1. 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.
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