Abstract
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.
- Received 16 January 2020
- Revised 5 March 2020
- Accepted 6 March 2020
DOI:https://doi.org/10.1103/PhysRevB.101.125121
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