This paper investigates the unconventional anomalous Hall effect (UAHE) and large anomalous Nernst effect (ANE) in the antiferromagnetic material SmMnBi₂. The study combines transport measurements, angle-resolved photoemission spectroscopy (ARPES), and first-principles calculations to demonstrate that the UAHE originates from the intrinsic Berry curvature due to canted antiferromagnetism, while the ANE is likely amplified by extrinsic mechanisms. SmMnBi₂ is identified as a promising material for exploring unusual transverse transport effects.

Kaixin Tang, Ye Yang, Jianchang Shen, Mengzhu Shi, Nan Zhang, Houpu Li, Hongyu Li, Zhengtai Liu, Dawei Shen, Rui Wang, Yang Gao, Junfeng He, Ziji Xiang, Xianhui Chen