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Soliton superlattices in twisted hexagonal boron nitride

Author

Listed:
  • G. X. Ni

    (Columbia University)

  • H. Wang

    (Chinese Academy of Sciences)

  • B.-Y. Jiang

    (University of California, San Diego)

  • L. X. Chen

    (Chinese Academy of Sciences)

  • Y. Du

    (University of California, San Diego)

  • Z. Y. Sun

    (University of California, San Diego)

  • M. D. Goldflam

    (University of California, San Diego)

  • A. J. Frenzel

    (University of California, San Diego)

  • X. M. Xie

    (Chinese Academy of Sciences)

  • M. M. Fogler

    (University of California, San Diego)

  • D. N. Basov

    (Columbia University)

Abstract

Properties of atomic van der Waals heterostructures are profoundly influenced by interlayer coupling, which critically depends on stacking of the proximal layers. Rotational misalignment or lattice mismatch of the layers gives rise to a periodic modulation of the stacking, the moiré superlattice. Provided the superlattice period extends over many unit cells, the coupled layers undergo lattice relaxation, leading to the concentration of strain at line defects – solitons - separating large area commensurate domains. We visualize such long-range periodic superstructures in thin crystals of hexagonal boron nitride using atomic-force microscopy and nano-infrared spectroscopy. The solitons form sub-surface hexagonal networks with periods of a few hundred nanometers. We analyze the topography and infrared contrast of these networks to obtain spatial distribution of local strain and its effect on the infrared-active phonons of hBN.

Suggested Citation

  • G. X. Ni & H. Wang & B.-Y. Jiang & L. X. Chen & Y. Du & Z. Y. Sun & M. D. Goldflam & A. J. Frenzel & X. M. Xie & M. M. Fogler & D. N. Basov, 2019. "Soliton superlattices in twisted hexagonal boron nitride," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12327-x
    DOI: 10.1038/s41467-019-12327-x
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    Cited by:

    1. Huagen Li & Dong Wang & Guoqiang Xu & Kaipeng Liu & Tan Zhang & Jiaxin Li & Guangming Tao & Shuihua Yang & Yanghua Lu & Run Hu & Shisheng Lin & Ying Li & Cheng-Wei Qiu, 2024. "Twisted moiré conductive thermal metasurface," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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