33% Giant Anomalous Hall Current Driven by both Intrinsic and Extrinsic Contributions in Magnetic Weyl Semimetal Co3Sn2S2

Abstract

Anomalous Hall effect (AHE) can be induced by intrinsic mechanism due to the band Berry phase and extrinsic one arising from the impurity scattering. The recently discovered magnetic Weyl semimetal Co3Sn2S2 exhibits a large intrinsic anomalous Hall conductivity (AHC) and a giant anomalous Hall angle (AHA). The predicted energy dependence of the AHC in this material exhibits a plateau at 1000 Ω-1 cm-1 and an energy width of 100 meV just below EF, thereby implying that the large intrinsic AHC will not significantly change against small-scale energy disturbances such as slight p-doping. Here, we successfully trigger the extrinsic contribution from alien-atom scattering in addition to the intrinsic one of the pristine material by introducing a small amount of Fe dopant to substitute Co in Co3Sn2S2. Our experimental results show that the AHC and AHA can be prominently enhanced up to 1850 Ω-1 cm-1 and 33%, respectively, owing to the synergistic contributions from the intrinsic and extrinsic mechanisms as distinguished by the TYJ model. In particular, the tuned AHA holds a record value in low fields among known magnetic materials. This study opens up a pathway to engineer giant AHE in magnetic Weyl semimetals, thereby potentially advancing the topological spintronics/Weyltronics.

16 pages, 5 figs

References in corpus (5)

• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Multivariable Scaling for the Anomalous Hall Effect
• Transition from Intrinsic to Extrinsic Anomalous Hall Effect in the Ferromagnetic Weyl Semimetal PrAlGe${}_{1-x}$Si${}_x$
• On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2
• Evidence of the side jump mechanism in the anomalous Hall effect in paramagnets

Cited by in corpus (7)

• Quantum oscillations, Magnetic breakdown and thermal Hall effect in Co${}_3$Sn${}_2$S${}_2$
• Large anomalous Hall angle in a topological semimetal candidate TbPtBi
• Kagome metals
• Electronic structure evolution of the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$ with hole and electron doping
• Extrinsic to intrinsic mechanism crossover of anomalous Hall effect in the Ir-doped MnPtSn Heusler system
• Field Orientation Dependent Magnetic Phases In Weyl Semimetal Co3Sn2S2
• Tunable Anomalous Hall Effect in a Kagome Ferromagnetic Weyl Semimetal