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arXiv · 1308.2343

Dynamics of an Insulating Skyrmion under a Temperature Gradient

Lingyao Kong·Jiadong Zang
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Abstract

We study the Skyrmion dynamics in thin films under a temperature gradient. Our numerical simulations show that both single and multiple Skyrmions in a crystal move towards the high temperature region, which is contrary to particle diffusion. Noticing a similar effect in the domain wall motion, we employ a theory based on magnon dynamics to explain this counterintuitive phenomenon. Unlike the temperature driven domain wall motion, the Skyrmion's topological charge plays an important role, and a transverse Skyrmion motion is observed. Our theory turns out to be in agreement with numerical simulations, both qualitatively and quantitatively. Our calculation indicated that a very promising Skyrmion dynamic phenomenon can be observed in experiments.

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Lingyao Kong, Jiadong Zang. 2013-08-10. Dynamics of an Insulating Skyrmion under a Temperature Gradient. https://doi.org/10.1103/physrevlett.111.067203

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