Room Temperature Reversible Spin Hall Effect

TL;DR

This paper demonstrates the reversible spin Hall effect at room temperature, confirming Onsager reciprocal relations between spin and charge currents using a platinum wire with strong spin-orbit interaction.

Contribution

It provides the first experimental demonstration of reversible spin Hall effect at room temperature, highlighting the use of platinum for enhanced spin Hall conductivity.

Findings

Reversible spin Hall effect detected at room temperature

Confirmed Onsager reciprocal relations between spin and charge currents

Achieved larger spin Hall conductivity than Aluminum wires

Abstract

Reversible spin Hall effect comprising the "direct" and "inverse" spin Hall effects was successfully detected at room temperature. This experimental demonstration proves the fundamental relations called Onsager reciprocal relations between spin and charge currents. A platinum wire with a strong spin-orbit interaction is used not only as a spin current absorber but also as a spin current source in the present lateral structure specially designed for clear detection of both charge and spin accumulations via the spin-orbit interaction. The obtained spin Hall conductivity is much larger than the reported value of Aluminum wire because of the larger spin-orbit interaction.