Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3

Abstract

We report the discovery of a novel skyrmion phase in the multiferroic insulator Cu2OSeO3 for magnetic fields below the equilibrium skyrmion pocket. This phase can be accessed by exciting the sample out of equilibrium with near-infrared (NIR) femtosecond laser pulses but can not be reached by any conventional field cooling protocol. From the strong wavelength dependence of the photocreation process and via spin dynamics simulations, we identify the magnetoelastic effect as the most likely photocreation mechanism. This effect results in a transient modification of the magnetic interaction extending the equilibrium skyrmion pocket to lower magnetic fields. Once created, the skyrmions rearrange and remain stable over a long time, reaching minutes. The presented results are relevant for designing high-efficiency non-volatile data storage based on magnetic skyrmions.

11 pages, 5 figures

References in corpus (9)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• The 2020 Skyrmionics Roadmap
• Magnon-skyrmion scattering in chiral magnets
• Topological Hall effect at above room temperature in heterostructures composed of a magnetic insulator and a heavy metal
• Observation of two independent skyrmion phases in a chiral magnetic material
• Strong Dzyaloshinskii-Moriya Interaction and Origin of Ferroelectricity in Cu2OSeO3
• Reversible Transformation between Isolated Skyrmions and Bimerons
• Low spin wave damping in the insulating chiral magnet Cu${}_2$OSeO${}_3$
• Room-temperature skyrmion phase in bulk Cu2OSeO3 under high pressures

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• Laser-Induced Topological Toggle Switching at Room Temperature in the van der Waals Ferromagnet Fe3GaTe2
• Microscopic theory of current-induced skyrmion transport and its application in disordered spin textures