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MA: Fachverband Magnetismus
MA 37: Skyrmions III
MA 37.1: Talk
Thursday, March 21, 2024, 09:30–09:45, EB 301
Classical and quantum skyrmions in monoaxial chiral magnets — •Vladyslav Kuchkin1,2, Stefan Liscak1, Andreas Haller1, Thomas Schmidt1, and Nikolai Kiselev3 — 1University of Luxembourg — 2University of Iceland — 3Forschungszentrum Jülich
Chiral magnets represent a special type of magnetic materials with non-zero Dzyaloshinskii-Moriya interactions (DMI). The interplay between DMI and Heisenberg exchange interaction can stabilize a wide variety of magnetic textures: spin spirals, skyrmion lattices, isolated solitons, etc. In ordinary magnets, the DMI is isotropic, which fixes the chirality type of all such textures. However, if the DMI vanishes in certain spatial directions, magnetic solitons of different chiralities might be stable. In our theoretical work, we have demonstrated the existence of skyrmions and antiskyrmions in such monoaxial chiral magnets and studied the static and dynamic properties of these solitons. In particular, we showed that applying a rotating magnetic field of frequency ω leads to a motion of solitons with a velocity v∼ω. From the point of view of quantum skyrmions, monoaxial chiral magnets are a unique system in which skyrmion and antiskyrmion states are energetically degenerate. The latter makes these materials promising for skyrmion-based quantum computation, in which skyrmions of different topological charges play the role of qubits.
Keywords: Magnetic skyrmion; Antiskyrmion; Monoaxial chiral magnet; Dzyaloshinskii-Moria interactions; Quantum skyrmion