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Non-local Spin-charge Conversion via Rashba Spin-Orbit Interaction

Research paper by Junji Fujimoto, Gen Tatara

Indexed on: 20 Dec '18Published on: 20 Dec '18Published in: arXiv - Physics - Mesoscopic Systems and Quantum Hall Effect



Abstract

We show theoretically that conversion between spin and charge by spin-orbit interaction in metals occurs even in a non-local setup where magnetization and spin-orbit interaction are spatially separated if electron diffusion is taken into account. Calculation is carried out for the Rashba spin-orbit interaction treating the coupling with a ferromagnet perturbatively. The results indicate the validity of the concept of effective spin gauge field (spin motive force) in the non-local configuration. The inverse Rashba-Edelstein effect observed for a trilayer of a ferromagnet, a normal metal and a heavy metal can be explained in terms of the non-local effective spin gauge field.