Soliton superlattices in twisted hexagonal boron nitride

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.

doi:10.1038/s41467-019-12327-x

Title: 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:

Ni, G. X. ^[1];

^[2]; Jiang, B. -Y. ^[3];

^[2]; Du, Y. ^[3]; Sun, Z. Y. ^[3]; Goldflam, M. D. ^[3]; Frenzel, A. J. ^[3]; Xie, X. M. ^[2]; Fogler, M. M. ^[3]; Basov, D. N. ^[1]

Columbia Univ., New York, NY (United States)
Chinese Academy of Sciences (CAS), Beijing (China)
Univ. of California, San Diego, CA (United States)

Publication Date:: 2019-09-25

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.  https://doi.org/10.1038/s41467-019-12327-x.

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                    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

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                    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.

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@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}

}

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Title: Soliton superlattices in twisted hexagonal boron nitride

Abstract

Citation Formats

Moiré excitons: From programmable quantum emitter arrays to spin-orbit–coupled artificial lattices journal, November 2017

Plasmons in graphene moiré superlattices journal, September 2015

Dislocations in stacking and commensurate-incommensurate phase transition in bilayer graphene and hexagonal boron nitride journal, June 2016

Graphene on hexagonal boron nitride journal, July 2014

van der Waals heterostructures combining graphene and hexagonal boron nitride journal, January 2019

Lattice parameters and anisotropic thermal expansion of hexagonal boron nitride in the 10?297.5�K temperature range journal, September 2002

Unconventional superconductivity in magic-angle graphene superlattices journal, March 2018

Phonon Polariton-assisted Infrared Nanoimaging of Local Strain in Hexagonal Boron Nitride journal, February 2019

Strain solitons and topological defects in bilayer graphene journal, June 2013

Helical networks in twisted bilayer graphene under interlayer bias journal, September 2013

Negative Thermal Expansion Coefficient of Graphene Measured by Raman Spectroscopy journal, August 2011

Photonic crystals for nano-light in moiré graphene superlattices journal, December 2018

Tunable moiré bands and strong correlations in small-twist-angle bilayer graphene journal, March 2017

Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides journal, April 2014

Van der Waals heterostructures journal, July 2013

Topological valley transport at bilayer graphene domain walls journal, April 2015

Polaritons in layered two-dimensional materials journal, November 2016

Fundamental limits to graphene plasmonics journal, May 2018

Topologically Protected Helical States in Minimally Twisted Bilayer Graphene journal, July 2018

Infrared Nanoscopy of Dirac Plasmons at the Graphene–SiO 2 Interface journal, October 2011

Gate-dependent pseudospin mixing in graphene/boron nitride moiré superlattices journal, August 2014

Moire bands in twisted double-layer graphene journal, July 2011

Electron Interactions and Gap Opening in Graphene Superlattices journal, December 2013

Tunable Phonon Polaritons in Atomically Thin van der Waals Crystals of Boron Nitride journal, March 2014

Soliton-dependent plasmon reflection at bilayer graphene domain walls journal, May 2016

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van der Waals heterostructures combining graphene and hexagonal boron nitride
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Topological valley transport at bilayer graphene domain walls
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