Spin orbit interaction induced spin-separation in platinum nanostructures

TL;DR

This paper demonstrates a novel platinum nanostructure exhibiting significant spin Hall effect, highlighting platinum's potential in spintronics through non-local measurement techniques.

Contribution

It introduces a new realization of Hirsch's geometry in platinum nanostructures and measures their large spin Hall conductivity, advancing spintronics research.

Findings

Large spin Hall conductivity observed in platinum

Comparison with gold and aluminum shows material dependence

Non-local measurement confirms intrinsic spin-separation

Abstract

Hirsch (1999) proposed a mechanism and geometry for the observation of the spin-Hall effect. In this work, we present a novel realization of the Hirsch geometry in a platinum (Pt) nanostructure, which is an increasingly important material for spintronics applications. Measurements were made in a non-local geometry to avoid spurious effects. The measurements show the large spin Hall conductivity of Pt. The results are compared with gold (Au) and aluminum (Al). Possible theoretical explanations of our observations are briefly mentioned.