Spin Wave Interference Detection via Inverse Spin Hall Effect

TL;DR

This paper demonstrates the detection of spin wave interference using the inverse spin Hall effect in a YIG waveguide, showing potential for spin wave logic circuits by converting phase information into electrical signals.

Contribution

The study provides experimental evidence of spin wave interference detection via ISHE, highlighting a novel method for phase-to-electrical signal conversion in spintronics.

Findings

ISHE voltage oscillates with phase difference

Interference pattern detectable at 2 mm and 4 mm distances

Potential application in spin wave logic circuits

Abstract

In this letter, we present experimental data demonstrating spin wave interference detection using spin Hall effect (ISHE). Two coherent spin waves are excited in a yttrium-iron garnet (YIG) waveguide by continuous microwave signals. The initial phase difference between the spin waves is controlled by the external phase shifter. The ISHE voltage is detected at a distance of 2 mm and 4 mm away from the spin wave generating antennae by an attached Pt layer. Experimental data show ISHE voltage oscillation as a function of the phase difference between the two interfering spin waves. This experiment demonstrates an intriguing possibility of using ISHE in spin wave logic circuit converting spin wave phase into an electric signal