Angular momentum transfer via relativistic spin-lattice coupling from first principles

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2022
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Mankovsky, Sergiy
Polesya, Svitlana
Ebert, Hubert
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Physical Review Letters. American Physical Society (APS). 2022, 129(6), 067202. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.129.067202
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The transfer and control of angular momentum is a key aspect for spintronic applications. Only recently, it was shown that it is possible to transfer angular momentum from the spin system to the lattice on ultrashort time scales. In an attempt to contribute to the understanding of angular momentum transfer between spin and lattice degrees of freedom we present a scheme to calculate fully-relativistic spin-lattice coupling parameters from first-principles. By treating changes in the spin configuration and atomic positions at the same level, closed expressions for the atomic spin-lattice coupling parameters can be derived in a coherent manner up to any order. Analyzing the properties of these parameters, in particular their dependence on spin-orbit coupling, we find that even in bcc Fe the leading term for the angular momentum exchange between the spin system and the lattice is a Dzyaloshiskii-Moriya-type interaction, which is due to the symmetry breaking distortion of the lattice.

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ISO 690MANKOVSKY, Sergiy, Svitlana POLESYA, Hannah LANGE, Markus WEISSENHOFER, Ulrich NOWAK, Hubert EBERT, 2022. Angular momentum transfer via relativistic spin-lattice coupling from first principles. In: Physical Review Letters. American Physical Society (APS). 2022, 129(6), 067202. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.129.067202
BibTex
@article{Mankovsky2022-03-30T08:35:09ZAngul-58334,
  year={2022},
  doi={10.1103/PhysRevLett.129.067202},
  title={Angular momentum transfer via relativistic spin-lattice coupling from first principles},
  number={6},
  volume={129},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Mankovsky, Sergiy and Polesya, Svitlana and Lange, Hannah and Weißenhofer, Markus and Nowak, Ulrich and Ebert, Hubert},
  note={Article Number: 067202}
}
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