We theoretically show that the carrier transport in monolayer Fe3GeTe2 experiences a transition between anomalous Hall effect and spin Hall effect when the spin polarization of disorders switches between out-of-plane and in-plane. These Hall effects are allowed when the magnetization is polarized in-plane, breaking the C3 rotation symmetry. The transition originates from the selection rule of spin scattering, the strong spin-orbit coupling, and the van Hove singularities near the Fermi surface. The scattering selection rule tolerates the sign change of the disorder spin, which provides a convenient method to detect the switching of antiferromagnetic insulators regardless of the interfacial roughness in a heterostructure. This provides a convenient platform for the study of 2D spintronics through various van-der-Waals heterostructures.
@article{arxiv.2305.09743,
title = {Spin scattering and Hall effects in monolayer Fe3GeTe2},
author = {Luyan Yu and Jie-Xiang Yu and Jiadong Zang and Roger K. Lake and Houlong Zhuang and Gen Yin},
journal= {arXiv preprint arXiv:2305.09743},
year = {2025}
}