Skyrmionium、Skyrmions和Antiskyrmions的动力学、钉扎效应与棘轮效应比较
Comparing Dynamics, Pinning and Ratchet Effects for Skyrmionium, Skyrmions, and Antiskyrmions
AI总结：
本研究比较了skyrmions、antiskyrmions和skyrmionium与不同缺陷及势场相互作用的驱动动力学，揭示了三者在速度变化、钉扎效应及棘轮效应上的差异，为磁织构的动力学调控提供参考。
摘要：
我们比较了skyrmions、antiskyrmions和skyrmionium与随机无序、圆形缺陷及不对称势相互作用时的驱动动力学。在恒定驱动下与线缺陷相互作用时，skyrmions和antiskyrmions沿壁运动时表现出加速效应，穿越势垒时速度下降；而skyrmionium沿壁运动时速度降低，穿越势垒后速度上升。对于点缺陷，skyrmionium会被钉扎有限的固定时间，skyrmions和antiskyrmions则因Magnus力发生偏转并出现加速效应。给定驱动下，skyrmionium的移动速度是skyrmions的两倍，但比后两者更易受钉扎效应影响。此外，存在一个临界阈值，skyrmionium在此阈值下转变为skyrmion，同时伴随织构速度下降。我们发现三种织构与不对称衬底相互作用时均表现出二极管和棘轮效应，但skyrmions和antiskyrmions因Magnus力的棘轮效应比skyrmionium更强。
英文摘要：
We compare the driven dynamics of skyrmions, antiskyrmions, and skyrmionium interacting with random disorder, circular defects, and asymmetric potentials. When interacting with a line defect at a constant drive, skyrmions and antiskyrmions show an acceleration effect for motion along the wall and a drop in velocity when they can cross the barrier. In contrast, skyrmionium travels at a reduced velocity when moving along a wall, and exhibits an increase in velocity once it can cross the barrier. For point defects, skyrmionium can be pinned for a finite fixed period of time, while for skyrmions and antiskyrmions, the Magnus force creates a deflection from the defect and an acceleration effect. For a given drive, skyrmionium moves twice as fast as skyrmions; however, skyrmionium is more susceptible to pinning effects than skyrmions and antiskyrmions. Additionally, there is a critical threshold where the skyrmionium transforms to a skyrmion that is associated with a drop in the velocity of the texture. We show that all three textures exhibit diode and ratchet effects when interacting with an asymmetric substrate, but skyrmions and antiskyrmions show a stronger ratcheting effect than skyrmionium due to the Magnus force.
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。
