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MA: Fachverband Magnetismus

MA 30: Skyrmions II

MA 30.5: Vortrag

Mittwoch, 20. März 2024, 16:15–16:30, EB 301

Stability of nonlocal magnetic solitons in an all-magnetic van der Waals heterostructure — •Moritz A. Goerzen¹, Dongzhe Li², Soumyajyoti Haldar¹, Tim Drevelow¹, and Stefan Heinze^1,3 — ¹ITAP, University of Kiel, Germany — ²CEMES, Université de Toulouse, CNRS, France — ³KiNSIS, University of Kiel, Germany

Stabilizing and controlling multiple topological spin states in atomically thin van der Waals (vdW) materials gained tremendous attention due to high tunability, enhanced functionality, and miniaturization. Here, using first-principles and atomistic spin simulations [1], we investigate the existence of multiple topological spin textures in an all-magnetic vdW heterostructure Fe₃GeTe₂/Cr₂Ge₂Te₆ (FGT/CGT). These states obey opposite rotational senses at the two sides of the FGT/CGT interface, which is in agreement with recent experimental measurements [2]. Magnetic skyrmions at the FGT layer and bimerons at the CGT layer persist in the heterostructure with zero magnetic field while the later undergo bimeron-skyrmion transformation if a field is applied. Furthermore, we show evidence of nonlocal spatial expanse, which makes them subject to finite-size effects. We analyze how this affects the stability of states in confined materials.

[1] Li et al., Phys. Nano Lett. 22, 7706-7713 (2022)
[2] Wu et al., Adv. Mater. 34, 2110583 (2022)

Keywords: bimeron; 2d magnet; spin dynamic simulation; GNEB