Reconfigurable all-in-one chaotic computing with skyrmions: Leveraging periodic modulations of perpendicular magnetic anisotropy

Magnetic skyrmions became critical elements in spintronics. Our study, through micromagnetic simulations, reveals that skyrmions experience chaotic changes in topological charge when exposed to sinusoidal variations in perpendicular magnetic anisotropy. This work introduces the following concept: a logic device based on a single skyrmion, which we envision as a stepping stone in chaotic computing. This conceptual device is designed to perform various logic operations in a reconfigurable format. We demonstrate the concept's feasibility by implementing sixteen 2-input logic gates, whose functionality depends on the skyrmion's initial conditions. These initial conditions can be manipulated by a current, accompanied by spin-orbit torque and the subsequent skyrmion-Hall effect. Our study presents an optimized logic operation map, highlighting specific initial conditions for corresponding logic operations. This work may provide the concept of a magnetic-field-free, low-power logic device, potentially contributing significantly to the development of advanced spintronic computing paradigms.