Giant Spin-Hall Effect induced by Zeeman Interaction in Graphene

TL;DR

This paper introduces a novel method to generate and detect spin currents in graphene through a large spin-Hall effect induced by Zeeman interaction, without relying on spin-orbit coupling, suitable for room-temperature spintronics.

Contribution

It demonstrates a new approach leveraging Zeeman interaction to produce significant spin-Hall responses in graphene near the neutrality point.

Findings

Large spin-Hall response achievable in moderate magnetic fields

Effect operates effectively up to room temperature

Potential for spintronics applications

Abstract

We propose a new approach to generate and detect spin currents in graphene, based on a large spin-Hall response arising near the neutrality point in the presence of external magnetic field. Spin currents result from the imbalance of the Hall resistivity for the spin-up and spin-down carriers induced by Zeeman interaction, and do not involve spin-orbit interaction. Large values of the spin-Hall response achievable in moderate magnetic fields produced by on-chip sources, and up to room temperature, make the effect viable for spintronics applications.