Inverse Edelstein effect induced by magnon - phonon coupling

TL;DR

This paper demonstrates a novel spin to charge current conversion mechanism via magnon-phonon coupling and inverse Edelstein effect in a hybrid device, highlighting acoustic spin pumping's potential for spintronic applications.

Contribution

It introduces the first experimental observation of inverse Edelstein effect induced by magnon-phonon coupling in a hybrid Ni/Cu(Ag)/Bi₂O₃ device, including analysis of symmetric and asymmetric voltage components.

Findings

Spin current generation of approximately 10^8 A/m² via magnon-phonon coupling.

Identification of symmetric and asymmetric inverse Edelstein effect voltage components.

Asymmetric contributions linked to interference of surface acoustic waves and anisotropic charge distribution.

Abstract

We demonstrate a spin to charge current conversion via magnon-phonon coupling and inverse Edelstein effect on the hybrid device Ni/Cu(Ag)/Bi$_{2}$O$_{3}$. The generation of spin current ($J_{s}\approx 10^{8}A/m^{2}$) due to magnon - phonon coupling reveals the viability of acoustic spin pumping as mechanism for the development of spintronic devices. A full in-plane magnetic field angle dependence of the power absorption and a combination of longitudinal and transverse voltage detection reveals the symmetric and asymmetric components of the inverse Edelstein effect voltage induced by Rayleigh type surface acoustic waves. While the symmetric components are well studied, asymmetric components are widely unexplored. We assign the asymmetric contributions to the interference between longitudinal and shear waves and an anisotropic charge distribution in our hybrid device.