# Full phonon dispersion along the stacking direction in nanoscale van der Waals materials by picosecond acoustics

https://mdr.nims.go.jp/datasets/448bdab8-b215-441a-94f0-7ab16defec68

## File

- [s41699-024-00475-8.pdf](https://mdr.nims.go.jp/filesets/8d9f00b9-647a-4b36-8898-72eb05a6928f/download) ([Detail](https://mdr.nims.go.jp/filesets/8d9f00b9-647a-4b36-8898-72eb05a6928f.md))

## Id

448bdab8-b215-441a-94f0-7ab16defec68

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-18T04:57:20.416128Z

## Updated at

2025-02-23T13:47:55.979946Z

## Published at

2025-02-23T13:47:56.077708Z

## Doi



## First published url

https://doi.org/10.1038/s41699-024-00475-8

## Date published

2024-06-13

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Full phonon dispersion along the stacking direction in nanoscale van der
    Waals materials by picosecond acoustics
  title_type: original
  lang: en

## Description

- description: Phonon dispersion in crystals determines many important material properties,
    but its measurement usually requires large-scale facilities and is limited to
    bulk samples. Here, we demonstrate the measurement of full phonon dispersion in
    nanoscale systems by using picosecond acoustics. A heterostructure sample was
    prepared consisting of layers of hexagonal boron nitride (hBN) sandwiching a thin
    layer of black phosphorous (BP), within which a strain pulse was generated by
    photoexcitation and observed with an optical probe in the BP layer. The strain
    pulse traversed to the few nanometer thick hBN layers, where it propagated to
    the edge and echoed back, like acoustic waves in Newton’s cradle. The echoes returning
    to the BP layer provided information on the frequency-dependent time-of-flight
    and group velocity dispersion of the sample system. Phonon frequency combs observed
    in the Fourier transform spectrum confirmed the strain wave round trips and demonstrated
    the feasibility of determining group velocity dispersion through photoacoustics.
  description_type: abstract
  lang: und

## Creator

- name: Seong-Yeon Lee
  role: author
- name: Soungmin Bae
  role: author
- name: Seonyeong Kim
  role: author
- name: Suyong Jung
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Hannes Raebiger
  role: author
- name: Ki-Ju Yee
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Phonon dispersion
  schema: not_defined
- subject: picosecond acoustics
  schema: not_defined
- subject: heterostructure
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: npj 2D Materials and Applications
  issn: '23977132'
  volume: '8'
  issue: '1'
  article_number: '39'

## Conference



## Related item



## Funding

- identifier: '202115353'
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: 23K04356
  funder_name: MEXT | Japan Society for the Promotion of Science

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Computational method



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## Fileset

- id: 8d9f00b9-647a-4b36-8898-72eb05a6928f
  filename: s41699-024-00475-8.pdf
  content_type: application/pdf
  size: 1614900
  md5: fda6be286ae51e07d39181209146de16

## Thumbnail

fileset_id: 8d9f00b9-647a-4b36-8898-72eb05a6928f
filename: s41699-024-00475-8.pdf