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PreprintCC BY 4.0arXiv

Resonant spin mode from retarded relaxation

  • J. Beater
  • G. S. Uhrig
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Abstract

In ultrafast spin dynamics additional modes in the THz range appear which cannot be captured by conventional Landau-Lifshitz equations. Extending these equations by further time derivatives (inertial Landau-Lifshitz-Gilbert equation) solves the issue only partly. Here we suggest to explain these modes by retarded Lindbladian relaxation. In spite of the simplicity of this phenomenological approach the agreement with the experimental data is promising: physically plausible parameters describe the position and the large width of these resonances. The salient feature of several almost equidistant resonance peaks is in-line with experimental evidence as well.

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Cite

BibTeXRIS
BibTeX
@misc{beater2026resonant,
  title = {{Resonant spin mode from retarded relaxation}},
  author = {J. Beater and G. S. Uhrig},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.21623},
  eprint = {2609.21623},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.21623},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Resonant spin mode from retarded relaxation
AU  - J. Beater
AU  - G. S. Uhrig
PY  - 2026
DA  - 2026/09/18
PB  - arXiv
DO  - 10.48550/arxiv.2609.21623
UR  - https://arxiv.org/abs/2609.21623
AB  - In ultrafast spin dynamics additional modes in the THz range appear which cannot be captured by conventional Landau-Lifshitz equations. Extending these equations by further time derivatives (inertial Landau-Lifshitz-Gilbert equation) solves the issue only partly. Here we suggest to explain these modes by retarded Lindbladian relaxation. In spite of the simplicity of this phenomenological approach the agreement with the experimental data is promising: physically plausible parameters describe the position and the large width of these resonances. The salient feature of several almost equidistant resonance peaks is in-line with experimental evidence as well.
ER  -