Abstract
In this study, the magnetotransport properties of antiferromagnetic half-Heusler single crystals of TbPtBi, a magnetic field-induced topological semimetal with a simple band structure, were investigated. We found a nonmonotonic dependence of the anomalous Hall resistivity on the magnetic field in a strong magnetic field (B > 7 T), which comes from the change in the band structure caused by the Zeeman-like splitting when an external magnetic field is applied. The experimental results show that credible anomalous Hall resistivity and conductivity reach up to 0.68 mΩ cm and 125 Ω−1 cm−1, respectively. A large anomalous Hall angle up to 33% is achieved in TbPtBi, which is comparable to a typical ferromagnetic Weyl semimetal. The analysis of the results shows that this should be attributed to the topological band around EF and low carrier density.
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