Exceptionally large anomalous Hall effect due to anticrossing of spin-split bands in the antiferromagnetic half-Heusler compound TbPtBi

Yanglin Zhu, Bahadur Singh, Yu Wang, Cheng Yi Huang, Wei Chi Chiu, Baokai Wang, David Graf, Yubo Zhang, Hsin Lin, Jianwei Sun, Arun Bansil, Zhiqiang Mao

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Abstract

We have investigated the magnetotransport properties and the topological electronic structure of the half-Heusler compound TbPtBi. Our experiments reveal an exceptionally large anomalous Hall effect (AHE) in the canted antiferromagnetic state of TbPtBi with the anomalous Hall angle reaching ∼0.68-0.76, which is a few times larger than the previously reported record in GdPtBi. First-principles electronic structure and the associated anomalous Hall conductivity were computed in order to interpret the experimental results. Our analysis shows that the AHE in TbPtBi does not originate from the Weyl points but that it is driven by the large net Berry curvature produced by the anticrossing of spin-split bands near the Fermi level in TbPtBi.

Original languageEnglish (US)
Article number161105
JournalPhysical Review B
Volume101
Issue number16
DOIs
StatePublished - Apr 15 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Zhu, Y., Singh, B., Wang, Y., Huang, C. Y., Chiu, W. C., Wang, B., Graf, D., Zhang, Y., Lin, H., Sun, J., Bansil, A., & Mao, Z. (2020). Exceptionally large anomalous Hall effect due to anticrossing of spin-split bands in the antiferromagnetic half-Heusler compound TbPtBi. Physical Review B, 101(16), [161105]. https://doi.org/10.1103/PhysRevB.101.161105