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MA: Fachverband Magnetismus
MA 6: Skyrmions I
MA 6.12: Vortrag
Montag, 17. März 2025, 18:15–18:30, H16
Emergence of polar skyrmions in 2D Janus CrInX3 (X=Se, Te) magnets — •Duo Wang1, Fengyi Zhou1, Monirul Shaikh2, and Biplab Sanyal3 — 1Macao Polytechnic University — 2University of Nebraska, Kearney — 3Uppsala University
In the realm of multiferroicity in 2D magnets, whether magnetic and polar skyrmions can coexist within a single topological entity has emerged as an important question. Here, we study Janus 2D magnets CrInX3 (X=Se, Te) for a comprehensive investigation of the magnetic ground state, magnetic excited state, and corresponding ferroelectric polarization by first-principles electronic structure calculations and Monte Carlo simulations. Specifically, we have thoroughly elucidated the magnetic exchange mechanisms, and have fully exemplified the magnetic field dependence of the magnon spectrum. More importantly, our study reveals a previously unrecognized, remarkably large spin-spiral-induced ferroelectric polarization (up to 194.9 μC/m2) in both compounds. We propose an approach to identify polar skyrmions within magnetic skyrmions, based on the observed direct correlation between spin texture and polarization density. Elucidating this correlation not only deepens our understanding of magnetic skyrmions but also paves the way for innovative research in the realm of multiferroic skyrmions.
Keywords: Skyrmions; First-principles calculation; KNB model; Magnetic exchange mechanism; classical Monte Carlo simulation