Topology-Governed Rotational dynamics of Magnetic soliton Assemblies under Pulsed Current

Skyrmions and antiskyrmions, as emergent topological spin textures, not only exhibit a wealth of novel physical phenomena but also represent promising candidates for next-generation spintronic devices due to their topological stability and low-current-driven dynamics. Investigating their responses to electric currents is essential for uncovering unique electromagnetic properties and advancing their integration into electronic technologies.

In this study, we demonstrate the novel, current-driven oppositely rotational dynamics of skyrmion and antiskyrmion assemblies via Lorentz transmission electron microscopy. Their dynamics are strongly linked to their inherent topological charges and largely independent of the current direction, with consistent behavior observed across various sample geometries. The theoretical analyses, combined with micromagnetic simulations, highlight the critical influence of boundary-induced confining potential and gyrotropic forces in steering the rotational behavior of (anti)skyrmions.