SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 46: Ultrafast Magnetization Effects II
MA 46.12: Vortrag
Freitag, 31. März 2023, 12:15–12:30, HSZ 02
Modelling spin-lattice coupling in computer simulation — •Michael Saur1, Markus Weißenhofer1, Hannah Lange2, Akashdeep Kamra3, Sergiy Mankovsky2, Svitlana Polesya2, Hubert Hubert2, and Ulrich Nowak1 — 1University of Konstanz, Germany — 2LMU Munich, Germany — 3Universidad Autónoma de Madrid, Spain
We develop a multiscale framework for the description of spin-lattice coupling in computer simulations [1]. The derived Hamiltonian describes a closed system of spin and lattice degrees of freedom and explicitly conserves the total momentum, angular momentum and energy. Using a new numerical implementation that corrects earlier Suzuki-Trotter decompositions we perform simulations on the basis of the resulting equations of motion to investigate the combined magnetic and mechanical motion of a ferromagnetic nanoparticle. The framework developed herein will enable the use of multi-scale modeling for investigating and understanding a broad range of spin-phonon-mediated phenomena from slow to ultrafast time scales.
[1] M. Weißenhofer, H. Lange, A. Kamra, S. Mankovsky, S. Polesya, H. Ebert, U. Nowak, doi 10.48550/ARXIV.2211.02382