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  Spin-Wave Doppler Shift by Magnon Drag in Magnetic Insulators

Yu, T., Wang, C., Sentef, M. A., & Bauer, G. E. W. (2021). Spin-Wave Doppler Shift by Magnon Drag in Magnetic Insulators. Physical Review Letters, 126(13): 137202. doi:10.1103/PhysRevLett.126.137202.

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PhysRevLett.126.137202.pdf (Publisher version), 476KB
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Open Access. - Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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Supplemental_Material.pdf (Supplementary material), 296KB
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Supplemental Material. - For the derivation of interaction Hamiltonian and incoherent exchange scattering, detailed comparison of spin currents with different parameters and discussion of the effects of interfacial DMI.
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https://arxiv.org/abs/2011.15008 (Preprint)
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 Creators:
Yu, T.1, Author              
Wang, C.2, Author
Sentef, M. A.1, Author              
Bauer, G. E. W.3, Author
Affiliations:
1Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
2Center for Joint Quantum Studies and Department of Physics,School of Science, Tianjin University, ou_persistent22              
3WPI-AIMR and Institute for Materials Research and CSRN, Tohoku University, ou_persistent22              

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 Abstract: The Doppler shift of the quasiparticle dispersion by charge currents is responsible for the critical supercurrents in superconductors and instabilities of the magnetic ground state of metallic ferromagnets. Here we predict an analogous effect in thin films of magnetic insulators in which microwaves emitted by a proximity stripline generate coherent chiral spin currents that cause a Doppler shift in the magnon dispersion. The spin-wave instability is suppressed by magnon-magnon interactions that limit spin currents to values close to but below the threshold for the instability. The spin current limitations by the backaction of magnon currents on the magnetic order should be considered as design parameters in magnonic devices.

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Language(s): eng - English
 Dates: 2020-11-302021-03-052021-03-302021-04-02
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: arXiv: 2011.15008
DOI: 10.1103/PhysRevLett.126.137202
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 126 (13) Sequence Number: 137202 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1