驱动磁Skyrmions中的雪崩和临界性
Avalanches and Criticality in Driven Magnetic Skyrmions
摘要：
我们使用数值模拟表明，缓慢驱动的skyrmions相互作用的随机钉扎移动通过相关的跳跃或雪崩。雪崩呈现幂律分布在其持续时间和大小，和不同的雪崩持续时间的平均雪崩形状可以缩放到一个通用的功能，在非平衡临界状态的系统的理论预测一致。Skyrmions的一个显著特征是非耗散的马格努斯项的影响。当我们增加马格努斯项与阻尼项的比率时，行为的普适性类别发生变化，平均雪崩形状变得越来越不对称，并且单个雪崩在垂直于其自身密度梯度的方向上表现出运动。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
