Guided Motion for Skyrmions Along Square Obstacle Arrays Interface

In this work we simulate the skyrmion motion when subjected to an ac drive in the presence of a square obstacle array. The obstacle array has two regions with different obstacle array structures. We consider drive amplitudes at which skyrmions in the bulk lattice undergo only localized orbit motion. However, when the interface is introduced, direct skyrmion transport occurs along the interface. We show that the skyrmion can be guided by the interface, even turning 90° corners. This results may be promising for developing interface structures for the skyrmion to follow, hence controlling its motion.