AI 中文总结
研究半赫斯勒铅化物TbAuPb的热力学和电输运性质，通过实验发现其结构、磁有序及电输运特性，结合第一性原理计算表明该化合物在不同状态下有不同拓扑性质。
AI 中文摘要
对TbAuPb单晶的结构、热力学和电输运性质进行了研究。该化合物结晶为具有半赫斯勒材料特征的立方MgAgAs型结构。它在TN = 5 K时反铁磁有序，并在高磁场中转变为不同的反铁磁相。TbAuPb中的电输运表现出多带特性，空穴型载流子占主导。角磁电阻随外加磁场系统地变化，并在自旋重取向转变附近改变其对称性，突出了电荷输运与磁有序之间的强耦合。第一性原理计算结果表明，TbAuPb在非磁性状态下是带反转半金属，在磁场诱导的铁磁状态下变为拓扑平凡。
英文摘要
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.
Comments9 Pages, 6 figures, 2 Pages supplementary information, Published in Physical Review Materials
Journal refPhys. Rev. Materials 10, 064407 (2026)
