Anomalous Hall effect driven by dipolar spin waves in uniform ferromagnets

TL;DR

This paper reveals a novel anomalous Hall effect caused by dipolar spin waves in uniform ferromagnets, independent of spin-orbit coupling, driven by chiral spin correlations and skew scattering mechanisms.

Contribution

It introduces a new type of anomalous Hall effect arising from dipolar spin waves in homogeneous ferromagnets, expanding understanding beyond relativistic spin-orbit coupling effects.

Findings

Anomalous Hall effect exists without relativistic spin-orbit coupling.

Hall conductivity is linked to chiral spin correlations.

Skew scattering by dipolar magnons explains the effect.

Abstract

A new type of anomalous Hall effect is shown to arise from the interaction of conduction electrons with dipolar spin waves in ferromagnets. This effect exists even in homogeneous ferromagnets without relativistic spin-orbit coupling. The leading contribution to the Hall conductivity is proportional to the chiral spin correlation of dynamical spin textures and is physically understood in terms of the skew scattering by dipolar magnons.