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arXiv · 1901.01208

Hydrodynamics of three-dimensional skyrmions in frustrated magnets

Ricardo Zarzuela·Héctor Ochoa·Yaroslav Tserkovnyak
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Abstract

We study the nucleation and collective dynamics of Shankar skyrmions [R. Shankar, Journal de Physique 38, 1405 (1977)] in the class of frustrated magnetic systems described by an SO(3) order parameter, including multi-lattice antiferromagnets and amorphous magnets. We infer the expression for the spin-transfer torque that injects skyrmion charge into the system and the Onsager-reciprocal pumping force that enables its detection by electrical means. The thermally-assisted flow of topological charge gives rise to an algebraically decaying drag signal in nonlocal transport measurements. We contrast our findings to analogous effects mediated by spin supercurrents.

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Ricardo Zarzuela, Héctor Ochoa, Yaroslav Tserkovnyak. 2019-01-04. Hydrodynamics of three-dimensional skyrmions in frustrated magnets. https://doi.org/10.1103/physrevb.100.054426

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