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Nanoscale lattice dynamics in hexagonal boron nitride moiré superlattices

Author

Listed:
  • S. L. Moore

    (Columbia University)

  • C. J. Ciccarino

    (Harvard University)

  • D. Halbertal

    (Columbia University)

  • L. J. McGilly

    (Columbia University)

  • N. R. Finney

    (Columbia University)

  • K. Yao

    (Columbia University)

  • Y. Shao

    (Columbia University)

  • G. Ni

    (Columbia University)

  • A. Sternbach

    (Columbia University)

  • E. J. Telford

    (Columbia University)

  • B. S. Kim

    (Columbia University)

  • S. E. Rossi

    (Columbia University)

  • K. Watanabe

    (National Institute for Materials Science)

  • T. Taniguchi

    (National Institute for Materials Science)

  • A. N. Pasupathy

    (Columbia University)

  • C. R. Dean

    (Columbia University)

  • J. Hone

    (Columbia University)

  • P. J. Schuck

    (Columbia University)

  • P. Narang

    (Harvard University)

  • D. N. Basov

    (Columbia University)

Abstract

Twisted two-dimensional van der Waals (vdW) heterostructures have unlocked a new means for manipulating the properties of quantum materials. The resulting mesoscopic moiré superlattices are accessible to a wide variety of scanning probes. To date, spatially-resolved techniques have prioritized electronic structure visualization, with lattice response experiments only in their infancy. Here, we therefore investigate lattice dynamics in twisted layers of hexagonal boron nitride (hBN), formed by a minute twist angle between two hBN monolayers assembled on a graphite substrate. Nano-infrared (nano-IR) spectroscopy reveals systematic variations of the in-plane optical phonon frequencies amongst the triangular domains and domain walls in the hBN moiré superlattices. Our first-principles calculations unveil a local and stacking-dependent interaction with the underlying graphite, prompting symmetry-breaking between the otherwise identical neighboring moiré domains of twisted hBN.

Suggested Citation

  • S. L. Moore & C. J. Ciccarino & D. Halbertal & L. J. McGilly & N. R. Finney & K. Yao & Y. Shao & G. Ni & A. Sternbach & E. J. Telford & B. S. Kim & S. E. Rossi & K. Watanabe & T. Taniguchi & A. N. Pas, 2021. "Nanoscale lattice dynamics in hexagonal boron nitride moiré superlattices," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26072-7
    DOI: 10.1038/s41467-021-26072-7
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    Cited by:

    1. Sebastián Castilla & Hitesh Agarwal & Ioannis Vangelidis & Yuliy V. Bludov & David Alcaraz Iranzo & Adrià Grabulosa & Matteo Ceccanti & Mikhail I. Vasilevskiy & Roshan Krishna Kumar & Eli Janzen & Jam, 2024. "Electrical spectroscopy of polaritonic nanoresonators," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Dorri Halbertal & Simon Turkel & Christopher J. Ciccarino & Jonas B. Profe & Nathan Finney & Valerie Hsieh & Kenji Watanabe & Takashi Taniguchi & James Hone & Cory Dean & Prineha Narang & Abhay N. Pas, 2022. "Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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