Nonlocal spin Hall effect and spin-orbit interaction in nonmagnetic metals

TL;DR

This paper theoretically investigates the nonlocal spin Hall effect in nonmagnetic metals, demonstrating how spin currents are deflected by spin-orbit interactions to produce measurable Hall effects, and proposes a method to analyze spin-orbit scattering.

Contribution

It introduces a theoretical framework for the nonlocal spin Hall effect in nonmagnetic metals and proposes a novel method to extract spin-orbit scattering information.

Findings

Spin currents are deflected by spin-orbit scattering to induce Hall currents.

Charge accumulation occurs at the edges of the metal due to the spin-current induced Hall effect.

A new method is proposed to extract spin-orbit scattering parameters from experimental data.

Abstract

Spin Hall effect in a nonlocal spin-injection device is theoretically studied. Using a nonlocal spin-injection technique, a pure spin current is created in a nonmagnetic metal (N). The spin current flowing in N is deflected by spin-orbit scattering to induce the Hall current in the transverse direction and accumulate charge at the edges of N, yielding the spin-current induced Hall effect. We propose a method for extracting information for spin-orbit scattering in nonmagnetic metals.