Anomalous Hall effect and Fermi surface reconstruction in topological antiferromagnet candidate GdAuPb

• DOI: 10.1063/5.0181680
• Publication Date: 2024-01-17T11:14:39Z
• Authors: Yonglai Liu; Xitong Xu; Yuqing Huang; Miao He; Haitian Zhao; Qingqi Zeng; Youming Zou; Chuanying Xi; Shuang Jia; Zhe Qu
• Keywords: Magnetism; Topological insulator

The combination of topology and magnetism has demonstrated great potential in the search emergent quantum matters. In this study, we report synthesis, magnetic, electrical properties GdAuPb, a rare-earth-based half-Heusler topological antiferromagnet candidate. Magnetization specific heat studies reveal highly frustrated antiferromagnetic ordering Gd at TN = 11.5 K. Interestingly, material possesses large, unsaturated magnetoresistance up to 800% below anomalous Hall conductivity as large 750 Ω−1cm−1 state. Moreover, electric transports including SdH oscillation patterns all exhibit sudden change around 9 T, indicating field-driven transition related Fermi surface reconstruction. These results suggest that GdAuPb is close critical point, which can be easily tuned via external parameters. Our study demonstrates strong interplay between band offers clues for designs antiferromagnets.