Thermal creep and the skyrmion Hall angle in driven skyrmion crystals

Reichhardt, Charles; Reichhardt, Cynthia Jane

doi:10.1088/1361-648X/aaefd7

Thermal creep and the skyrmion Hall angle in driven skyrmion crystals

Journal Article · Sun Dec 30 23:00:00 EST 2018 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/1361-648X/aaefd7· OSTI ID:1484650

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this study, we numerically examine thermal effects on the skyrmion Hall angle for driven skyrmions interacting with quenched disorder. We identify a creep regime in which motion occurs via intermittent jumps between pinned and flowing states. Here the skyrmion Hall angle is zero since the skyrmions have time to relax into equilibrium positions in the pinning sites, eliminating the side-jump motion induced by the Magnus force. At higher drives we find a crossover to a viscous flow regime where the skyrmion Hall angle is finite and increases with increasing drive or temperature. Finally, our results are in agreement with recent experiments which also show a regime of finite skyrmion velocity with zero skyrmion Hall angle crossing over to a viscous flow regime with a skyrmion Hall angle that increases with drive.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1484650

Alternate ID(s):: OSTI ID: 1768528
OSTI ID: 23008798

Report Number(s):: LA-UR--18-24474

Journal Information:: Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 7 Vol. 31; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Thermal skyrmion diffusion used in a reshuffler device Zázvorka, Jakub; Jakobs, Florian; Heinze, Daniel Nature Nanotechnology, Vol. 14, Issue 7 https://doi.org/10.1038/s41565-019-0436-8	journal	April 2019
The role of temperature and drive current in skyrmion dynamics Litzius, Kai; Leliaert, Jonathan; Bassirian, Pedram Nature Electronics, Vol. 3, Issue 1 https://doi.org/10.1038/s41928-019-0359-2	journal	January 2020
Nonlinear transport, dynamic ordering, and clustering for driven skyrmions on random pinning Reichhardt, C.; Reichhardt, C. J. O. Physical Review B, Vol. 99, Issue 10 https://doi.org/10.1103/physrevb.99.104418	journal	March 2019
Active microrheology, Hall effect, and jamming in chiral fluids Reichhardt, C.; Reichhardt, C. J. O. Physical Review E, Vol. 100, Issue 1 https://doi.org/10.1103/physreve.100.012604	journal	July 2019
Thermal skyrmion diffusion used in a reshuffler device Zázvorka, Jakub; Jakobs, Florian; Heinze, Daniel Nature Publishing Group https://doi.org/10.25358/openscience-466	text	January 2019

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