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MA: Fachverband Magnetismus
MA 16: Skyrmions I
MA 16.3: Vortrag
Dienstag, 10. März 2026, 10:00–10:15, HSZ/0004
Statistical Signature of Chirality as a Probe of Skyrmion Topology and Collapse Dynamics — Shiyu Zhou1, •Kai Litzius2, Felix Büttner2,3, and Lucas Caretta1,4 — 1Department of Physics, Brown University, Providence, Rhode Island 02912, USA — 2Center for Electronic Correlations and Magnetism, University of Augsburg, Augsburg, Germany — 3Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany — 4School of Engineering, Brown University, Providence, Rhode Island 02912, USA
Magnetic skyrmions are topological spin textures whose robustness has driven intense interest for spintronic applications, yet direct experimental evidence linking topology to stability has been limited. We introduce an accessible, material-agnostic method to probe skyrmion topology statistically by measuring annihilation field distributions using Kerr microscopy. By tuning in-plane magnetic fields, we drive transitions from topologically nontrivial to trivial skyrmion states and observe a clear shift in annihilation behavior: skyrmions show broad, thermally activated distributions, while trivial bubbles collapse deterministically with narrow distributions. Micromagnetic simulations corroborate this correlation between topology and collapse statistics. Our approach enables straightforward chirality detection and skyrmion state control without specialized imaging or transport probes. The ability to toggle between deterministic and stochastic collapse suggests new device concepts, including synchronized deletion for memory and topology-tunable randomness for probabilistic applications.
Keywords: skyrmion; topological protection; topology; MOKE