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    Intrinsic and extrinsic dual-component evolution of electronic transport in a magnetic Weyl semimetal

    Yiting Feng1,2, Meng Lyu1, Jinying Yang1,2, Shen Zhang1,3, Yibo Wang1,2, Qiusa Ren1,4, Binbin Wang1, Hongxiang Wei1, Baogen Shen1,3 et al.

    Enke Liu1,*

    • *Contact author: ekliu@iphy.ac.cn

    Phys. Rev. B 114, 045131 – Published 29 July, 2026

    DOI: https://doi.org/10.1103/lr7n-yjhb

    Abstract

    Co2MnGa, a magnetic Weyl semimetal exhibiting significant anomalous Hall conductivity (AHC) and anomalous Hall angle (AHA) over a wide temperature range, provides an excellent platform for tuning and revealing the rules of the intrinsic and extrinsic contributions to electronic transverse transports. In the dual-component magnetic Weyl semimetal Co2MnGa, we modulate the intrinsic and extrinsic components of AHC through doping strategies. In the case of Co1.8Fe0.2MnGa, AHC is entirely contributed by intrinsic mechanisms without extrinsic contribution over the temperature range from 2 to 300 K. Conversely, for all concentrations of Ni doping, the AHC arises from dual-component contributions. Our analysis also uncovers a hyperbolic relationship between the AHA and longitudinal conductivity (σxx), with a distinct minimum value, suggesting that large AHA can be achieved in both clean and disordered regimes. Additionally, we present a schematic diagram illustrating the evolution of the extrinsic contribution to AHC and propose tuning strategies for optimizing AHC by incorporating extrinsic components and adjusting the Fermi level. Our work provides essential physical insights into the evolution of intrinsic and extrinsic components of electronic transport, facilitating the exploration of applications for magnetic Weyl semimetals.

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