Inverse Orbital Torque via Spin-Orbital Intertwined States
E. Santos, J. E. Abrão, Dongwook Go, L.K.C.S. Assis, Yuriy Mokrousov, J. B. S. Mendes, A. Azevedo
Abstract
Spin torque induced by orbital current has become of great interest, as it allows the use of lighter elements in the development of advanced spin-orbitronic devices. Meanwhile, the inverse orbital torque (IOT) effect, in which an orbital current creates a charge current, has been difficult to detect. This study uses pumped spin-orbital current in Y${}_{3}$Fe${}_{5}$O${}_{12}$/Pt/CuO${}_{x}$ heterostructures to investigate the IOT effect. Mixed spin-orbital states propagate to the Pt/CuO${}_{x}$ interface and create a much stronger transverse charge current than that created without the CuO${}_{x}$ coating. This inverse orbital Rashba-Edelstein effect can be used to advance applications in spintronics.