Spin-Hall Detector

TL;DR

This study demonstrates the presence of the spin Hall effect in metals with spin-orbit interaction using oscillographic analysis of Hall voltage under alternating current, revealing potential for spintronics applications.

Contribution

It provides experimental evidence of chiral features of the spin Hall effect with alternating current, highlighting unique properties like frequency doubling for device use.

Findings

Confirmed spin Hall effect in platinum with AC current

Identified chiral, frequency-doubling transverse voltage features

Showed independence from current and magnetic field directions

Abstract

An oscillographic study of the Hall voltage with an unpolarized alternating current through a platinum sample revealed choral features of the Hall effect, which clearly demonstrate the presence of the spin Hall effect in metals with a noticeable spin-orbit interaction. It was confirmed that, as in the case of direct current, the possibility of a spin-Hall effect is associated with the presence of an imbalance of the spins and charges at the edges of the samples, which is realized using their asymmetric geometry. In particular, it was found that such chiral features of the nonequilibrium spin-Hall effect, such as independence from the direction of the injection current and the direction of the constant magnetic field, in the case of alternating current, make it possible to obtain a double-frequency transverse voltage, which can be used as a platform for creating spintronics devices.