Band-Filling Effect on Anomalous Hall Conductivity andThermoelectric Property in Weyl Semimetal Co₃Sn₂S₂

The anomalous Hall effect (AHE) arises from both intrinsic and extrinsic mechanisms. Recent studies have shown that doping enhances the anomalous Hall conductivity (AHC) in Co₃Sn₂S₂, prompting an investigation into its band structure. In this work, we demonstrate that both Ni-substitution and Fe-substitution enhance the AHC, which we attribute to shifts in the Fermi energy (E_F) and band-broadening effects, as confirmed by our angle-resolved photoemission spectroscopy measurements. Additionally, we report the temperature (T)-dependence of the Seebeck coefficient (S) and thermal conductivity (κ). The S (T) curve fitting provides additional support for dopant-induced modifications of the band structure and E_F, and κ (T) exhibits decreased values in Fe-doped and Ni-doped samples. These findings enhance our understanding of band-filling effects on AHC, potentially advancing topological spintronics.