Hybrid Spin Noise Spectroscopy and the Spin Hall Effect

TL;DR

This paper introduces a new hybrid spin noise spectroscopy method that detects the spin Hall effect through specific voltage correlations, enhancing understanding of spin-charge interactions in semiconductors.

Contribution

The paper presents a novel spectroscopy technique sensitive to the spin Hall effect via transverse voltage correlations, advancing spin-charge coupling studies.

Findings

Spin-transverse voltage correlation is sensitive to the spin Hall effect.

Standard spin-spin correlation function is not sensitive to the spin Hall effect.

The method could be applied to study spin-charge coupling in semiconductors.

Abstract

Here we suggest a novel hybrid spin noise spectroscopy technique, which is sensitive to the spin Hall effect. It is shown that, while the standard spin-spin correlation function is not sensitive to the spin Hall effect, spin-transverse voltage and transverse voltage-voltage correlation functions provide the missing sensitivity being linear and quadratic in the spin Hall coefficient, respectively. The correlation between transverse voltage and spin fluctuations appears as a result of spin-charge coupling fundamental for the spin Hall effect. We anticipate that the proposed method could find applications in the studies of spin-charge coupling in semiconductors.