Shapiro Spikes and Negative Mobility for Skyrmion Motion on Quasi-One-Dimensional Periodic Substrates
arXiv:1606.09283 · doi:10.1103/PhysRevB.95.014412
Abstract
Using a simple numerical model of skyrmions in a two-dimensional system interacting with a quasi-one dimensional periodic substrate under combined dc and ac drives where the dc drive is applied perpendicular to the substrate periodicity, we show that a rich variety of novel phase locking dynamics can occur due to the influence of the Magnus term on the skyrmion dynamics. Instead of Shapiro steps, the velocity response in the direction of the dc drive exhibits a series of spikes, including extended dc drive intervals over which the skyrmions move in the direction opposite to the dc drive, producing negative mobility. There are also specific dc drive values at which the skyrmions move exactly perpendicular to the dc drive direction, giving a condition of absolute transverse mobility.
arXiv comment5 pages, 4 postscript figures
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Cited by in corpus (8)
- Statics and Dynamics of Skyrmions Interacting with Pinning: A Review
- The effect of the Magnus force on skyrmion relaxation dynamics
- Shapiro Steps and Nonlinear Skyrmion Hall Angles For dc and ac Driven Skyrmions on a Two Dimensional Periodic Substrate
- Disordering, Clustering, and Laning Transitions in Particle Systems with Dispersion in the Magnus Term
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