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- W4311938016 abstract "In antiferromagnetic (AFM) materials, localized self-sustaining states called solitons, namely, domain walls (DWs) and skyrmions, can be efficiently driven by currents and achieve velocities of several kilometers per second. These solitons are massive particles and therefore cannot travel faster than a limiting velocity akin to the speed of light for the material. The specifics of these high-velocity dynamics, in which solitons begin to display relativistic effects, have been well understood for the case of DWs (single-dimensional particles). Here, we perform an extensive and systematic atomistic study of both one-dimensional and two-dimensional soliton dynamics in chiral magnetic materials, both at and away from angular momentum compensation. We develop an elastic restorative force model to explain the dynamic skyrmion deformations, supported by simulation data. We claim that these deformations arise from a local imbalance of gyrotropic forces. We also present an outlook on the role of skyrmion compactness in their deformation patterns, velocity limits, as well as the absence of behaviors similar to ones observed in relativistic DWs. We claim that limits on skyrmion compactness also impede their ability to reach the velocity regime where relativistic effects begin to occur in rapidly moving DWs, due to the critical skyrmion breakdown behavior. These results could prove to be significant to the field of spintronics, as well as the potential applications of skyrmions for novel logic and memory devices." @default.
- W4311938016 created "2023-01-02" @default.
- W4311938016 creator A5001051492 @default.
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- W4311938016 date "2022-12-08" @default.
- W4311938016 modified "2023-09-27" @default.
- W4311938016 title "Atomistic simulations of distortion-limited high-speed dynamics of antiferromagnetic skyrmions" @default.
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- W4311938016 doi "https://doi.org/10.1103/physrevb.106.l220402" @default.
- W4311938016 hasPublicationYear "2022" @default.
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