Regensburg 2022 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 12: Skyrmions 1 (joint session MA/KFM)

KFM 12.8: Talk

Tuesday, September 6, 2022, 11:30–11:45, H37

Skyrmion lattice dynamics — •Daniel Schick, Markus Weißenhofer, Levente Rózsa, and Ulrich Nowak — Universität Konstanz, Konstanz, Germany

We investigate the movement of skyrmions in lattices by performing molecular dynamics simulations based on the Thiele equation [1], using different effective skyrmion-skyrmion interactions. We compare mean-square displacement and the dynamical orientational correlation function g₆(t) for different values of damping α and different topological charges and find the topological charge to change the effect of damping on the examined quantities. Furthermore, we find that for finite topological charge, the mean-square displacement in low-density skyrmion lattices increases compared to free diffusion. By comparing to trivial topology, we can demonstrate the increase in mean-square displacement to be the result of the gyrocoupling of skyrmions.

[1] A.A. Thiele, Phys. Rev. Lett. 30, 6 (1973)