Disorder driven crossover between anomalous Hall regimes in FeGaTe
arXiv:2507.23243 · doi:10.1103/PhysRevB.111.184438
Abstract
The large anomalous Hall conductivity (AHC) of the Fe(Ge,Ga)Te compounds has attracted considerable attention. Here, we expose the intrinsic nature of AHC in FeGaTe crystals characterized by high conductivities, which show disorder-independent AHC with a pronounced value 420 cm. In the low conductivity regime, we observe the scaling relation , which crosses over to as 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 -point. Therefore, FeGaTe 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.
9 pages, 6 figures
References in corpus (32)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Restoring the density-gradient expansion for exchange in solids and surfaces
- Generalized gradient approximation for solids and their surfaces
- Quantum Spin Hall Effect in Graphene
- Advanced capabilities for materials modelling with Quantum ESPRESSO
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Berry Phase Effects on Electronic Properties
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Anomalous Hall effect
- Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
- Topological Insulators in Three Dimensions
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
- Dirac semimetal in three dimensions
- Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBiTe
- Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
- Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
- Proper Scaling of the Anomalous Hall Effect
- Intrinsic vs. extrinsic anomalous Hall effect in ferromagnets
- Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
- Multivariable Scaling for the Anomalous Hall Effect
- A hidden constant in the anomalous Hall effect of a high-purity magnet MnSi
- High performance Wannier interpolation of Berry curvature and related quantities: WannierBerri code
- Charge Transport in Manganites: Hopping Conduction, the Anomalous Hall Effect and Universal Scaling
- The anomalous Hall Effect and magnetoresistance in the layered ferromagnet Fe_{1/4}TaS_2: the inelastic regime
- Room-temperature sub-100 nm Néel-type skyrmions in non-stoichiometric van der Waals ferromagnet with ultrafast laser writability
- Hall effect in cobalt-doped TiO
- Magnetoresistance and Hall Effect in the Ferromagnetic Semiconductor GaMnAs
- Anomalous Hall effect in insulating Ga1-xMnxAs