Magnetic skyrmions show directional diffusion through asymmetric gate in simulations

Simulations by Waseda University researchers demonstrate that magnetic skyrmions diffuse asymmetrically through an off-center gate, moving more readily from left to right. This behavior arises from their chiral dynamics and topology-dependent interactions with the gate. The finding suggests a potential route for geometry-controlled information processing in unconventional AI hardware.

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The Waseda University team modeled Néel-type skyrmions within a nanostructured magnetic thin film featuring two chambers joined by a narrow off-center gate. Their simulations, published in npj Spintronics on July 16, 2026, showed that thermally driven skyrmions crossed this gate more frequently from the left chamber than from the right, creating a measurable directional bias over finite time intervals.

This asymmetry did not stem from the gate's geometry alone. Rather, it emerged from