Quantized Topological States in High-quality Intrinsic Magnetic Topological Insulator MnBi<sub>2</sub>Te<sub>4</sub>

ORAL

Abstract

As an intrinsic magnetic topological insulator, MnBi2Te4 features both magnetism and non-trivial band topology without the need for the magnetic dopants that limit the quality of the material. As a result, zero-field quantum anomalous Hall (QAH) effect has been observed in a five-septuple-layer (5SL) MnBi2Te4. In this talk, I will show that improved sample quality leads to better quantization of the QAHE at higher temperatures. Furthermore, more quantized topological states emerge in high magnetic field up to 45 T, as a result of intricate interplay between QAH and conventional quantum Hall effects. Our findings pave the way for exploring topological quantum phenomena such as chiral Majorana edge state and topological superconductivity.

*This work is supported in part by the National Natural Science Foundation of China (Grants Nos. 1235000130, 12350401, 12204115, 12004075, 62171136, 12350404, 12174066),National Key R&D Program of China (grant no. 2022YFA1403301,2019YFA0308404), Shanghai Municipal Science and Technology Commission (grant no. 23JC1400600, 2019SHZDZX01,23JC1400600, 2019SHZDZX01), Shanghai Science and Technology Development Funds (grant no. 22QA1400600) and Systematic Fundamental Research Program Leveraging Major Scientific and Technological Infrastructure, Chinese Academy of Sciences under contract no. JZHKYPT-2021-08.

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Publication: Z Guo, J Gao, Z Huang, D Yue, Z Liu, M Luo,S Wu, X Chen,G Huang, M Shi, Z Xu, C Xi, G Kuang, C Zheng, S Wu, H Jiang, X Xie, Y Sun , X Chen, J Wang, W Ruan, Y Zhang. Quantized Topological States in High-quality Intrinsic Magnetic Topological Insulator MnBi2Te4, in preparation.

Presenters

  • Zhongxun Guo

    • Fudan University

Authors

  • Zhongxun Guo

    • Fudan University

  • Jingjing Gao

    • Fudan University

  • Zhiwei Huang

    • Fudan University

  • Di Yue

    • Fudan University

  • Zhaochen Liu

    • Fudan University

  • Mingyan Luo

    • Fudan University

  • Shuang Wu

    • Fudan University

  • Xinyu Chen

    • Fudan University

  • Guangyi Huang

    • Fudan University

  • Mengzhu Shi

    • University of Science and Technology of China

  • Zihan Xu

    • SixCarbon Technology

  • Chuanying Xi

    • Chinese Academy of Sciences
    • Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences

  • Guangli Kuang

    • Chinese Academy of Sciences
    • Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences

  • Changlin Zheng

    • Fudan University

  • Shiwei Wu

    • Fudan University

  • Hua Jiang

    • Soochow Univ

  • Xin-Cheng Xie

    • Peking University
    • International Center for Quantum Materials, School of Physics, Peking University

  • Yuping Sun

    • Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences
    • University of Science and Technology of China

  • Xianhui Chen

    • University of Science and Technology of China

  • Jing Wang

    • Fudan University

  • Wei Ruan

    • Fudan University
    • Fudan Univ

  • Yuanbo Zhang

    • Fudan University
    • Fudan Univ