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arXiv · 2607.14011

Thermodynamic and electrical transport properties of the half-Heusler plumbide TbAuPb

Abhinav Agarwal·Snehashish Chatterjee·Maciej J. Winiarski·Orest Pavlosiuk·Dorota A. Kowalska·Piotr Wisniewski·Dariusz Kaczorowski
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Abstract

Structural, thermodynamic and electrical transport properties of TbAuPb were investigated on single crystals. The compound was found to crystallize with the cubic MgAgAs-type structure characteristic of half-Heusler materials. It orders antiferromagnetically at TN = 5 K and undergoes a transition into a different antiferromagnetic phase emerging in high magnetic fields. Electrical transport in TbAuPb exhibits a multiband character, with a predominance of hole-like carriers. Angular magnetoresistance evolves systematically with applied magnetic field and changes its symmetry near the spin-reorientation transition, highlighting strong coupling between the charge transport and the magnetic order. The results of first-principles calculations indicate that TbAuPb is a band inverted semimetal in the non-magnetic state, which becomes topologically trivial in the field-induced ferromagnetic state.

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Abhinav Agarwal, Snehashish Chatterjee, Maciej J. Winiarski, Orest Pavlosiuk, Dorota A. Kowalska, Piotr Wisniewski, Dariusz Kaczorowski. 2026-07-15. Thermodynamic and electrical transport properties of the half-Heusler plumbide TbAuPb. https://doi.org/10.1103/hjtb-zs5w

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