Charge and spin Hall effect in spin chiral ferromagnetic graphene

TL;DR

This paper predicts a novel charge Hall effect in ferromagnetic graphene driven by spin Hall mechanisms, occurring without external magnetic fields, due to spin chiral configurations affecting electron and hole behaviors.

Contribution

It introduces the concept of charge Hall effect in ferromagnetic graphene caused by spin chiral configurations, expanding understanding of spin-orbit phenomena in 2D materials.

Findings

Charge Hall effect predicted in ferromagnetic graphene.

Effect occurs without external magnetic field.

Spin chiral configuration influences electron and hole types.

Abstract

We predict a specific type of charge Hall effect in undoped ferromagnetic graphene that is generated by the spin Hall mechanism in the absence of an external magnetic field. The essential feature is the so-called spin chiral configuration of the spin subbands in such a magnetic material where carriers with opposite spin direction are of different type of electron-like or hole-like. Within the semiclassical theory of spin-orbital dynamics of electrons, we obtain that a longitudinal electric field can produce a spin-orbit transverse current of pure charge with no polarization of the spin and the valley.