PRB · 2022

Magnetically tunable Shubnikov-de Haas oscillations in MnBi2Te4

Xiao Lei, Liang Zhou, Zhanyang Hao, Hongtao Liu, Shuo Yang, Hai-Peng Sun, Xiaozhou Ma, Chen Ma, Le Wang, Hai-Zhou Lu, Jia-Wei Mei^†, Jiannong Wang^†, Hongtao He^†

Magnetic Topological MatterTopological Quantum Transport

DOI PDF arXiv

Abstract

We observe Shubnikov-de Haas oscillations in undoped antiferromagnetic topological-insulator MnBi2Te4. The oscillation period evolves through the canted-antiferromagnetic to ferromagnetic transition and saturates at high fields, revealing field-induced band-structure changes. A nontrivial Berry phase and small effective mass are extracted, while tilted fields split the high-field oscillations.