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Correlated states in doubly-aligned hBN/graphene/hBN heterostructures

Author

Listed:
  • Xingdan Sun

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Shihao Zhang

    (ShanghaiTech University
    ShanghaiTech University)

  • Zhiyong Liu

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Honglei Zhu

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Jinqiang Huang

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Kai Yuan

    (Peking University
    Collaborative Innovation Center of Quantum Matter)

  • Zhenhua Wang

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Kenji Watanabe

    (National Institute for Materials Science)

  • Takashi Taniguchi

    (National Institute for Materials Science)

  • Xiaoxi Li

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China
    Shanxi University
    Shanxi University)

  • Mengjian Zhu

    (National University of Defense Technology)

  • Jinhai Mao

    (University of Chinese Academy of Sciences)

  • Teng Yang

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Jun Kang

    (Beijing Computational Science Research Center)

  • Jianpeng Liu

    (ShanghaiTech University
    ShanghaiTech University)

  • Yu Ye

    (Peking University
    Collaborative Innovation Center of Quantum Matter)

  • Zheng Vitto Han

    (Shanxi University
    Shanxi University)

  • Zhidong Zhang

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

Abstract

Interfacial moiré superlattices in van der Waals vertical assemblies effectively reconstruct the crystal symmetry, leading to opportunities for investigating exotic quantum states. Notably, a two-dimensional nanosheet has top and bottom open surfaces, allowing the specific case of doubly aligned super-moiré lattice to serve as a toy model for studying the tunable lattice symmetry and the complexity of related electronic structures. Here, we show that by doubly aligning a graphene monolayer to both top and bottom encapsulating hexagonal boron nitride (h-BN), multiple conductivity minima are observed away from the main Dirac point, which are sensitively tunable with respect to the small twist angles. Moreover, our experimental evidences together with theoretical calculations suggest correlated insulating states at integer fillings of −5, −6, −7 electrons per moiré unit cell, possibly due to inter-valley coherence. Our results provide a way to construct intriguing correlations in 2D electronic systems in the weak interaction regime.

Suggested Citation

  • Xingdan Sun & Shihao Zhang & Zhiyong Liu & Honglei Zhu & Jinqiang Huang & Kai Yuan & Zhenhua Wang & Kenji Watanabe & Takashi Taniguchi & Xiaoxi Li & Mengjian Zhu & Jinhai Mao & Teng Yang & Jun Kang & , 2021. "Correlated states in doubly-aligned hBN/graphene/hBN heterostructures," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27514-y
    DOI: 10.1038/s41467-021-27514-y
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    Cited by:

    1. Everton Arrighi & Viet-Hung Nguyen & Mario Di Luca & Gaia Maffione & Yuanzhuo Hong & Liam Farrar & Kenji Watanabe & Takashi Taniguchi & Dominique Mailly & Jean-Christophe Charlier & Rebeca Ribeiro-Pal, 2023. "Non-identical moiré twins in bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Junxiong Hu & Junyou Tan & Mohammed M. Al Ezzi & Udvas Chattopadhyay & Jian Gou & Yuntian Zheng & Zihao Wang & Jiayu Chen & Reshmi Thottathil & Jiangbo Luo & Kenji Watanabe & Takashi Taniguchi & Andre, 2023. "Controlled alignment of supermoiré lattice in double-aligned graphene heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Mohit Kumar Jat & Priya Tiwari & Robin Bajaj & Ishita Shitut & Shinjan Mandal & Kenji Watanabe & Takashi Taniguchi & H. R. Krishnamurthy & Manish Jain & Aveek Bid, 2024. "Higher order gaps in the renormalized band structure of doubly aligned hBN/bilayer graphene moiré superlattice," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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