Enhanced anomalous Hall effect in the magnetic topological semimetal
Physical Review B, 2020•APS
We study the anomalous Hall effect (AHE) of single-crystalline Co 3 Sn 2− x In x S 2 over a
large range of indium concentration x from 0 to 1. Their magnetization reduces progressively
with increasing x while their ground state evolves from a ferromagnetic Weyl semimetal into
a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their
intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around x=
0.15. The change of the intrinsic AHC corresponds with the doping evolution of Berry …
large range of indium concentration x from 0 to 1. Their magnetization reduces progressively
with increasing x while their ground state evolves from a ferromagnetic Weyl semimetal into
a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their
intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around x=
0.15. The change of the intrinsic AHC corresponds with the doping evolution of Berry …
We study the anomalous Hall effect (AHE) of single-crystalline over a large range of indium concentration from 0 to 1. Their magnetization reduces progressively with increasing while their ground state evolves from a ferromagnetic Weyl semimetal into a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around . The change of the intrinsic AHC corresponds with the doping evolution of Berry curvature and the maximum arises from the magnetic topological nodal-ring gap. Our experimental results show a larger AHC in a fundamental nodal-ring gap than that of Weyl nodes.
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