The large anomalous Hall conductivity (AHC) of the Fe3(Ge,Ga)Te2 compounds has attracted considerable attention. Here, we expose the intrinsic nature of AHC in Fe3GaTe2 crystals characterized by high conductivities, which show disorder-independent AHC with a pronounced value σxyc≈ 420 Ω−1cm−1. In the low conductivity regime, we observe the scaling relation σxy∝σxx1.6, which crosses over to σxy≃σxyc as σxx increases. Disorder in low-conductivity crystals is confirmed by the broadening of a first-order transition between ferromagnetism and the ferrimagnetic ground state. Through density functional theory (DFT) calculations, we reveal that the dominant sources of Berry curvature are located a few hundred meV below the Fermi energy around the Γ-point. Therefore, Fe3GaTe2 clearly exposes the disorder-induced crossover among distinct AHC regimes, previously inferred from measurements on different ferromagnets located in either side of the crossover region.
@article{arxiv.2507.23243,
title = {Disorder driven crossover between anomalous Hall regimes in Fe$_3$GaTe$_2$},
author = {Sang-Eon Lee and Minkyu Park and W. Kice Brown and Vadym Kulichenko and Yan Xin and S. H. Rhim and Chanyong Hwang and Jaeyong Kim and Gregory T. McCandless and Julia Y. Chan and Luis Balicas},
journal= {arXiv preprint arXiv:2507.23243},
year = {2025}
}