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• W1844503988 abstract "We study the dynamics of skyrmions in Dzyaloshinskii-Moriya materials with easy-axis anisotropy. An important link between topology and dynamics is established through the construction of unambiguous conservation laws obtained earlier in connection with magnetic bubbles and vortices. In particular, we study the motion of a topological skyrmion with skyrmion number $Q=1$ and a nontopological skyrmionium with $Q=0$ under the influence of an applied field gradient. The $Q=1$ skyrmion undergoes Hall motion perpendicular to the direction of the field gradient with a drift velocity proportional to the gradient. In contrast, the nontopological $Q=0$ skyrmionium is accelerated in the direction of the field gradient, thus exhibiting ordinary Newtonian motion. When the applied field is switched off the $Q=1$ skyrmion is spontaneously pinned around a fixed guiding center, whereas the $Q=0$ skyrmionium moves with constant velocity $v$. We give a systematic calculation of a skyrmionium traveling with any constant velocity $v$ that is smaller than a critical velocity ${v}_{c}$." @default.
• W1844503988 created "2016-06-24" @default.
• W1844503988 creator A5065499869 @default.
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• W1844503988 date "2015-08-10" @default.
• W1844503988 modified "2023-10-18" @default.
• W1844503988 title "Skyrmion dynamics in chiral ferromagnets" @default.
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• W1844503988 doi "https://doi.org/10.1103/physrevb.92.064412" @default.
• W1844503988 hasPublicationYear "2015" @default.
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