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Magnon-polaron anomaly in nonlocal spin transport through antiferromagnetic insulators

Tabatabaei, S.M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevB.104.014432
  3. Publisher: American Physical Society , 2021
  4. Abstract:
  5. We present a nonlocal spin transport theory for the coupled dynamics of magnetization and lattice vibrations in antiferromagnetic insulators. We find that magnon-polaron formation, i.e., coherently hybridized magnon and acoustic phonon modes, not only leads to anomalous features in the nonlocal spin current but also renormalizes the spin-flop transition field of the antiferromagnets. A length scale for the magnon-polaron formation below which the spin current is not affected by the lattice is also extracted from this nonlocal setup. © 2021 American Physical Society
  6. Keywords:
  7. Antiferromagnetism ; Lattice theory ; Lattice vibrations ; Polarons ; Statistical mechanics ; Vibrations (mechanical) ; Acoustic phonons ; Antiferromagnetic insulators ; Antiferromagnets ; Coupled dynamics ; Polaron formation ; Spin transport ; Spin transport theories ; Spin-flop transitions ; Spin fluctuations
  8. Source: Physical Review B ; Volume 104, Issue 1 , 2021 ; 24699950 (ISSN)
  9. URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.014432