Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.68: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Anisotropic skyrmion liquid phase — •Daniel Schick1, Tim Matthies2, Thomas Mutschler1, Levente Rózsa3,4, and Ulrich Nowak1 — 1University of Konstanz, Konstanz, Germany — 2University of Hamburg, Hamburg, Germany — 3Wigner Research Centre for Physics, Budapest, Hungary — 4Budapest University of Technology and Economics, Budapest, Hungary
Melting transitions in two-dimensional systems of particles have attracted much attention in research since the development of the Kosterlitz-Thouless-Harperlin-Nelson-Young theory,
particularly because of an intermediate phase with long-ranged orientational but short-ranged translational order, called the hexatic phase.
Magnetic skyrmions are topological quasiparticles in thin magnetic films and, due to their two-dimensional nature, are subject to KTHNY theory. Recently, the hexatic phase was identified experimentally in skyrmion lattices [1].
Here, we use a molecular dynamics simulation to study the phase transitions in skyrmion ensembles. Taking into account the anisotropic interaction of skyrmions in the (Pt0.95Ir0.05)/Fe/Pd(111) system, we show how this anisotropy influences the phase of the skyrmion system. Instead of an intermediate hexatic phase between solid and liquid phase, one observes a direct solid-liquid transition, with a global orientational order even in the liquid phase.
[1] R.Gruber et. al. Nat. Nanotechnol. 20, 1405-1411 (2025)
Keywords: skyrmions; KTHNY; topology; anisotropy