Inverse spin Hall effect in a closed loop circuit

TL;DR

This paper demonstrates a novel method to measure the inverse spin Hall effect by detecting the generated charge current in a closed loop, providing a direct and potentially more accurate way to analyze spin-to-charge conversion.

Contribution

It introduces a new closed-loop measurement technique for the inverse spin Hall effect, linking charge current to spin Hall angle and loop resistance.

Findings

Charge current in the loop correlates with spin Hall angle

Method applied to Bi-doped Cu and Pt

Derived expression relates charge current to material properties

Abstract

We present measurements of inverse spin Hall effects (ISHEs) in which the conversion of a spin current into a charge current via the ISHE is detected not as a voltage in a standard open circuit but directly as the charge current generated in a closed loop. The method is applied to the ISHEs of Bi-doped Cu and Pt. The derived expression of ISHE for the loop structure can relate the charge current flowing into the loop to the spin Hall angle of the SHE material and the resistance of the loop.