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arXiv · 2603.07723

Anomalous magnetotransport in the single-crystalline half-Heusler antiferromagnet ErPdSb

Abhinav Agarwal·Shovan Dan·Maciej J. Winiarski·Orest Pavlosiuk·Piotr Wisniewski·Dariusz Kaczorowski
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Abstract

We report the thermodynamic and magnetotransport properties of the half-Heusler antimonide ErPdSb, studied on single-crystalline samples in wide ranges of temperature and magnetic fields. The compound was found to order antiferromagnetically at 1.2 K. In the paramagnetic state, it shows semimetallic behavior with a broad hump in the temperature-dependent electrical resistivity around 70 K. The results of ab initio calculations of the electronic structure of ErPdSb indicated a bulk insulating nature. In small magnetic fields the magnetoresistance is driven by a weak antilocalization effect, while in strong fields it is negative and describable by the deGennes-Friedel formalism. The Hall effect data indicated that holes are the dominant charge carriers. At 2 K, the Hall conductivity exhibits a sizable anomalous contribution, which is obscured by multiband effects at higher temperatures. The angular magnetoresistance shows unusual features as functions of magnetic field and temperature, pointing to a possible field-induced reconstruction of the Fermi surface.

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Abhinav Agarwal, Shovan Dan, Maciej J. Winiarski, Orest Pavlosiuk, Piotr Wisniewski, Dariusz Kaczorowski. 2026-03-08. Anomalous magnetotransport in the single-crystalline half-Heusler antiferromagnet ErPdSb. https://doi.org/10.1103/29bg-k9vh

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