The research group of researcher Ye Ji from the School of Physics and collaborators reveal the magnetic behavior of the few-layer manganese antimony tellurium

Recently, the intrinsic two-dimensional magnetic topological insulator manganese bismuth tellurium (MnBi ₂ Te ₄ ) has attracted much attention due to the observation of a series of novel quantum phenomena such as Chen insulators and axion insulators

Researcher Ye Ji, Institute of Condensed Matter Physics and Materials Physics, School of Physics, Peking University, Frontier Science Center for Nano-Optoelectronics, State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, and Professor Huang Yuan from Beijing Institute of Technology, and Professor Lei Hechang from Renmin University of China, etc.

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In the study of the antiferromagnetic phase (Fig.

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In the ferromagnetic phase study (Fig.

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On January 3, 2022, the related research results were published online under the title " Layer - _{Number -} Dependent Antiferromagnetic and Ferromagnetic Behavior in MnSb ₂ Te ₄ " In Physical Review Letters ("Physical Review Letters"); Zang Zhihao, a 2017 doctoral student at Peking University School of Physics, is the first author, Ye Ji, Huang Yuan and Lei Hechang are the co-corresponding authors, and the collaborators also include Liu Liwei from Beijing Institute of Technology Professor, Professor Wang Yeliang, researcher Gao Peng of Peking University, Professor Yang Jinbo .

The above research work was supported by the National Key R&D Program, the National Natural Science Foundation of China, the Beijing Natural Science Foundation, and the Electron Microscopy Laboratory of Peking University