中国物理B ›› 2024, Vol. 33 ›› Issue (2): 26802-026802.doi: 10.1088/1674-1056/ad082a

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Growth and characterization of Bi(110)/CrTe2 heterostructures: Exploring interplay between magnetism and topology

Zhenyu Yuan(袁震宇)1,2, Fazhi Yang(杨发枝)1,2, Baiqing Lv(吕佰晴)3, Yaobo Huang(黄耀波)4, Tian Qian(钱天)1,5, Jinpeng Xu(徐金朋)1,2,6,7,†, and Hong Ding(丁洪)3,6   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences(CAS), Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
    3 Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    4 Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
    5 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    6 CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China;
    7 School of Physics, Shandong University, Ji'nan 250100 China
  • 收稿日期:2023-09-14 修回日期:2023-10-20 接受日期:2023-10-31 出版日期:2024-01-16 发布日期:2024-01-29
  • 通讯作者: Jinpeng Xu E-mail:xujp@iphy.ac.cn
  • 基金资助:
    The work at IOP is supported by grants from the National Natural Science Foundation of China (Grant No. U2032204), the Ministry of Science and Technology of China (Grant No. 2022YFA1403800), and the Chinese Academy of Sciences (Grant No. XDB33000000).

Growth and characterization of Bi(110)/CrTe2 heterostructures: Exploring interplay between magnetism and topology

Zhenyu Yuan(袁震宇)1,2, Fazhi Yang(杨发枝)1,2, Baiqing Lv(吕佰晴)3, Yaobo Huang(黄耀波)4, Tian Qian(钱天)1,5, Jinpeng Xu(徐金朋)1,2,6,7,†, and Hong Ding(丁洪)3,6   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences(CAS), Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
    3 Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    4 Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
    5 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    6 CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China;
    7 School of Physics, Shandong University, Ji'nan 250100 China
  • Received:2023-09-14 Revised:2023-10-20 Accepted:2023-10-31 Online:2024-01-16 Published:2024-01-29
  • Contact: Jinpeng Xu E-mail:xujp@iphy.ac.cn
  • Supported by:
    The work at IOP is supported by grants from the National Natural Science Foundation of China (Grant No. U2032204), the Ministry of Science and Technology of China (Grant No. 2022YFA1403800), and the Chinese Academy of Sciences (Grant No. XDB33000000).

摘要: The interplay between topology and magnetism is vital for realizing exotic quantum phenomena, significant examples including quantum anomalous Hall effect, axion insulators, and high-order topological states. These states host great potential for future applications in high-speed and low-consumption electronic devices. Despite being extensively investigated, practical platforms are still scarce. In this work, with molecular beam epitaxy (MBE), we provide the first experimental report on high-quality Bi(110)/CrTe$_{2}$ magnetic heterostructure. By employing in-situ high-resolution scanning tunneling microscopy, we are able to examine the interaction between magnetism and topology. There is a potential edge state at an energy level above the Fermi level, but no edge states observed near the Fermi level The absence of high-order topological corner states near $E_{\rm F}$ highlights the importance of lattice matching and interface engineering in designing high-order topological states. Our study provides key insights into the interplay between two-dimensional magnetic and topological materials and offers an important dimension for engineering magnetic topological states.

关键词: bismuth (110), chromium ditelluride (CrTe2), topological states, scanning tunneling microscopy (STM)

Abstract: The interplay between topology and magnetism is vital for realizing exotic quantum phenomena, significant examples including quantum anomalous Hall effect, axion insulators, and high-order topological states. These states host great potential for future applications in high-speed and low-consumption electronic devices. Despite being extensively investigated, practical platforms are still scarce. In this work, with molecular beam epitaxy (MBE), we provide the first experimental report on high-quality Bi(110)/CrTe$_{2}$ magnetic heterostructure. By employing in-situ high-resolution scanning tunneling microscopy, we are able to examine the interaction between magnetism and topology. There is a potential edge state at an energy level above the Fermi level, but no edge states observed near the Fermi level The absence of high-order topological corner states near $E_{\rm F}$ highlights the importance of lattice matching and interface engineering in designing high-order topological states. Our study provides key insights into the interplay between two-dimensional magnetic and topological materials and offers an important dimension for engineering magnetic topological states.

Key words: bismuth (110), chromium ditelluride (CrTe2), topological states, scanning tunneling microscopy (STM)

中图分类号:  (Physical properties of thin films, nonelectronic)

  • 68.60.-p
73.90.+f (Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures) 73.22.-f (Electronic structure of nanoscale materials and related systems) 75.75.Lf (Electronic structure of magnetic nanoparticles)