Avalanches and Criticality in Driven Magnetic Skyrmions
arXiv:1712.02415 · doi:10.1103/PhysRevLett.120.117203
Abstract
We show using numerical simulations that slowly driven skyrmions interacting with random pinning move via correlated jumps or avalanches. The avalanches exhibit power law distributions in their duration and size, and the average avalanche shape for different avalanche durations can be scaled to a universal function, in agreement with theoretical predictions for systems in a nonequilibrium critical state. A distinctive feature of skyrmions is the influence of the non-dissipative Magnus term. When we increase the ratio of the Magnus term to the damping term, a change in the universality class of the behavior occurs, the average avalanche shape becomes increasingly asymmetric, and individual avalanches exhibit motion in the direction perpendicular to their own density gradient.
5 pages, 4 pdf figures
References in corpus (6)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
- Theory of current-driven motion of Skyrmions and spirals in helical magnets
- A new class of chiral materials hosting magnetic skyrmions beyond room temperature
- Capturing of a Magnetic Skyrmion with a Hole
- Quantized Transport for a Skyrmion Moving on a Two-Dimensional Periodic Substrate
Cited by in corpus (12)
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- Thermal Creep and the Skyrmion Hall Angle in Driven Skyrmion Crystals
- Skyrmion relaxation dynamics in the presence of quenched disorder
- Laminar and transiently disordered dynamics of a magnetic skyrmion pipe flow
- Nonlinear Dynamics, Avalanches and Noise for Driven Wigner Crystals
- Shear Banding, Intermittency, Jamming and Dynamic Phases for Skyrmions in Inhomogeneous Pinning Arrays
- Particle-like skyrmions interacting with a funnel obstacle
- Quantum Depinning of a Magnetic Skyrmion
- Structural transition of skyrmion quasiparticles under compression
- Late stages in the ordering of magnetic skyrmion lattices
- Magnetic domain dynamics in an insulating quantum ferromagnet
- Avalanches in the Random Organization Model with long-range interactions