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- W4312109601 abstract "Exotic magnetic textures emerging from the subtle interplay between thermodynamic and topological fluctuation have attracted intense interest due to their potential applications in spintronic devices. Recent advances in electron microscopy enable the imaging of random photogenerated individual skyrmions. However, their deterministic and dynamical manipulation is hampered by the chaotic nature of such fluctuations and the intrinsically irreversible switching between different minima in the magnetic energy landscape. Here, we demonstrate a method to coherently control the rotation of a skyrmion crystal by discrete amounts at speeds which are much faster than previously observed. By employing circularly polarized femtosecond laser pulses with an energy below the band gap of the Mott insulator Cu2OSeO3, we excite a collective magnon mode via the inverse Faraday effect. This triggers coherent magnetic oscillations that directly control the rotation of a skyrmion crystal imaged by cryo-Lorentz transmission electron microscopy. The manipulation of topological order via ultrafast laser pulses shown here can be used to engineer fast spin-based logical devices.Received 22 July 2022Revised 13 September 2022Accepted 16 November 2022DOI:https://doi.org/10.1103/PhysRevX.12.041030Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMagnetic textureMagnetismSpin dynamicsSpintronicsCondensed Matter, Materials & Applied Physics" @default.
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- W4312109601 date "2022-12-20" @default.
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- W4312109601 title "Imaging the Ultrafast Coherent Control of a Skyrmion Crystal" @default.
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- W4312109601 doi "https://doi.org/10.1103/physrevx.12.041030" @default.
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