The Rashba effect can convert a spin current (cyan arrow) into a charge current vortex (yellow arrows). © 2021 RIKEN Center for Emergent Matter Science

By using numerical simulations, Sadamichi Maekawa and Seiji Yunoki, both from the RIKEN Center for Emergent Matter Science, together with their co-workers have demonstrated the conversion of a spin current into a rotating vortex of charge current.
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Two-dimensional materials and interfaces can convert spin current into a vortex of charge current