Transverse and unidirectional spin pumping
Phys. Rev. B 113, 014438 – Published 28 January, 2026
DOI: https://doi.org/10.1103/3l46-tx5b
Abstract
Conventional spin pumping, driven by magnetization dynamics, is longitudinal since the pumped spin current flows normal to the interface between the ferromagnet and the conductor. We predict Hall-type/transverse and unidirectional spin pumping into conductors by near-field electromagnetic radiation emitted by, e.g., magnetization dynamics. The joint effect of the electric and magnetic fields results in a pure spin current flowing parallel to the interface, i.e., a Hall-type spin pumping, which is highly efficient due to the strong coupling to the electric field. Such a transverse spin current is unidirectional, with the spatial distribution controlled by the magnetization direction. Our finding reveals a robust approach for generating and manipulating spin currents in future low-dimensional spintronic and orbitronic devices.
