Soliton superlattices in twisted hexagonal boron nitride
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.
- Authors:
-
- Columbia Univ., New York, NY (United States)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Univ. of California, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Programmable Quantum Materials (Pro-QM); Columbia Univ., New York, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1613233
- Grant/Contract Number:
- SC0019443
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; Science & Technology - Other Topics
Citation Formats
Ni, G. X., Wang, H., Jiang, B. -Y., Chen, L. X., Du, Y., Sun, Z. Y., Goldflam, M. D., Frenzel, A. J., Xie, X. M., Fogler, M. M., and Basov, D. N. Soliton superlattices in twisted hexagonal boron nitride. United States: N. p., 2019.
Web. doi:10.1038/s41467-019-12327-x.
Ni, G. X., Wang, H., Jiang, B. -Y., Chen, L. X., Du, Y., Sun, Z. Y., Goldflam, M. D., Frenzel, A. J., Xie, X. M., Fogler, M. M., & Basov, D. N. Soliton superlattices in twisted hexagonal boron nitride. United States. https://doi.org/10.1038/s41467-019-12327-x
Ni, G. X., Wang, H., Jiang, B. -Y., Chen, L. X., Du, Y., Sun, Z. Y., Goldflam, M. D., Frenzel, A. J., Xie, X. M., Fogler, M. M., and Basov, D. N. Wed .
"Soliton superlattices in twisted hexagonal boron nitride". United States. https://doi.org/10.1038/s41467-019-12327-x. https://www.osti.gov/servlets/purl/1613233.
@article{osti_1613233,
title = {Soliton superlattices in twisted hexagonal boron nitride},
author = {Ni, G. X. and Wang, H. and Jiang, B. -Y. and Chen, L. X. and Du, Y. and Sun, Z. Y. and Goldflam, M. D. and Frenzel, A. J. and Xie, X. M. and Fogler, M. M. and Basov, D. N.},
abstractNote = {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.},
doi = {10.1038/s41467-019-12327-x},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {9}
}
Web of Science
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