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Realization of Lieb lattice in covalent-organic frameworks with tunable topology and magnetism

Author

Listed:
  • Bin Cui

    (Shandong University)

  • Xingwen Zheng

    (Shandong University)

  • Jianfeng Wang

    (Beijing Computational Science Research Center)

  • Desheng Liu

    (Shandong University)

  • Shijie Xie

    (Shandong University)

  • Bing Huang

    (Beijing Computational Science Research Center)

Abstract

Lieb lattice has been predicted to host various exotic electronic properties due to its unusual Dirac-flat band structure. However, the realization of a Lieb lattice in a real material is still unachievable. Based on tight-binding modeling, we find that the lattice distortion can significantly determine the electronic and topological properties of a Lieb lattice. Importantly, based on first-principles calculations, we predict that the two existing covalent organic frameworks (COFs), i.e., sp2C-COF and sp2N-COF, are actually the first two material realizations of organic-ligand-based Lieb lattice. Interestingly, the sp2C-COF can experience the phase transitions from a paramagnetic state to a ferromagnetic one and then to a Néel antiferromagnetic one, as the carrier doping concentration increases. Our findings not only confirm the first material realization of Lieb lattice in COFs, but also offer a possible way to achieve tunable topology and magnetism in organic lattices.

Suggested Citation

  • Bin Cui & Xingwen Zheng & Jianfeng Wang & Desheng Liu & Shijie Xie & Bing Huang, 2020. "Realization of Lieb lattice in covalent-organic frameworks with tunable topology and magnetism," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-13794-y
    DOI: 10.1038/s41467-019-13794-y
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    Cited by:

    1. Yoonseok Hwang & Jun-Won Rhim & Bohm-Jung Yang, 2021. "Geometric characterization of anomalous Landau levels of isolated flat bands," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    2. Xin Zhang & Xiaoyin Li & Zhengwang Cheng & Aixi Chen & Pengdong Wang & Xingyue Wang & Xiaoxu Lei & Qi Bian & Shaojian Li & Bingkai Yuan & Jianzhi Gao & Fang-Sen Li & Minghu Pan & Feng Liu, 2024. "Large-scale 2D heterostructures from hydrogen-bonded organic frameworks and graphene with distinct Dirac and flat bands," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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