Hydrodynamics of three-dimensional skyrmions in frustrated magnets
| Autor: | Yaroslav Tserkovnyak, Ricardo Zarzuela, Hector Ochoa |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Skyrmion Nucleation FOS: Physical sciences Charge (physics) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Flow (mathematics) Drag Magnet 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics 0210 nano-technology Topological quantum number Spin-½ |
| DOI: | 10.48550/arxiv.1901.01208 |
| Popis: | 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. Comment: 5+3 pages |
| Databáze: | OpenAIRE |
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