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arXiv · 2108.02621

Dynamics of Magnetic Skyrmions under Temperature Gradients

Chaofan Gong·Yan Zhou·Guoping Zhao
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Abstract

We expand the Zhang-Li spin-transfer torque [Phys. Rev. Lett. 93, 127204 (2004)] to finite temperatures by the scattering amplitude. Considering various factors including the adiabatic and diabatic effects of electrons and magnons, entropy equivalent field, thermal dipole field, thermal activation, magnetic-anisotropy gradient, and diffusion, we answer a recent question both experimentally and theoretically controversial: Will skyrmions move to the hot or cold region under thermal gradients?

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Chaofan Gong, Yan Zhou, Guoping Zhao. 2021-08-05. Dynamics of Magnetic Skyrmions under Temperature Gradients. https://arxiv.org/abs/2108.02621

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