# Strongly Hybridized Phonons in One-Dimensional van der Waals Crystals

https://mdr.nims.go.jp/datasets/fbdf9d60-c4f8-49a7-80d2-8a7555e05420

## File

- [2408.08596v2.pdf](https://mdr.nims.go.jp/filesets/a78f9b5d-c6d6-4a57-a7c3-d2dec4c48e9c/download) ([Detail](https://mdr.nims.go.jp/filesets/a78f9b5d-c6d6-4a57-a7c3-d2dec4c48e9c.md))

## Id

fbdf9d60-c4f8-49a7-80d2-8a7555e05420

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-24T04:35:21.609697Z

## Updated at

2025-12-24T05:22:33.732588Z

## Published at

2025-12-24T07:20:30.126851Z

## Doi

https://doi.org/10.48505/nims.6062

## First published url

https://doi.org/10.1103/PhysRevLett.134.176101

## Date published

2025-04-28

## Recorded date published

2025-4

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Strongly Hybridized Phonons in One-Dimensional van der Waals Crystals
  title_type: original
  lang: en

## Description

- description: The phenomena of pronounced electron-electron and electron-phonon interactions
    in one-dimensional (1D) systems are ubiquitous, which are well described by frameworks
    of Luttinger liquid, Peierls instability, and concomitant charge density wave.
    However, the experimental observation of strongly hybridized phonons in 1D was
    not demonstrated. Herein we report the first observation of strongly hybridized
    phonons in 1D condensed matters by using double-walled carbon nanotubes (DWNTs),
    representative 1D van der Waals crystals, by combining the spectroscopic and microscopic
    tools as well as the ab initio density functional theory (DFT) calculations. We
    observe uncharted phonon modes in one commensurate and three incommensurate DWNT
    crystals, three of which concurrently exhibit strongly reconstructed electronic
    band structures. Our DFT calculations for the experimentally observed commensurate
    DWNT (7, 7) @ (12, 12) reveal that this new phonon mode originates from a (nearly)
    degenerate coupling between two transverse acoustic modes (ZA modes) of constituent
    inner and outer nanotubes having approximately trigonal and pentagonal rotational
    symmetry along the nanotube circumferences. Such coupling strongly hybridizes
    the two phonon modes in different shells and leads to the formation of a unique
    lattice motion featuring evenly distributed vibrational amplitudes over inner
    and outer nanotubes, distinct from any known phonon modes in 1D systems. All four
    DWNTs that exhibit the pronounced new phonon modes show small chiral angle twists,
    closely matched diameter ratios of 3/5 and decreased frequencies of new phonon
    modes with increased diameters, all supporting the uncovered coupling mechanism.
    Our discovery of strongly hybridized phonons in DWNTs opens new opportunities
    for engineering phonons and exploring novel phonon-related phenomena in 1D condensed
    matters.
  description_type: abstract
  lang: en

## Creator

- name: Shaoqi Sun
  role: author
- name: Qingyun Lin
  role: author
- name: Yihuan Li
  role: author
- name: Daichi Kozawa
  role: author
  orcid: https://orcid.org/0000-0002-0629-5589
  organization: National Institute for Materials Science
- name: Huizhen Wu
  role: author
- name: Shigeo Maruyama
  role: author
- name: Pilkyung Moon
  role: author
- name: Toshikaze Kariyado
  role: author
  orcid: https://orcid.org/0000-0002-3746-6803
  organization: National Institute for Materials Science
- name: Ryo Kitaura
  role: author
  orcid: https://orcid.org/0000-0001-8108-109X
  organization: National Institute for Materials Science
- name: Sihan Zhao
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: phonon
  schema: not_defined

## Rights

- description: "©2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

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## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review Letters
  issn: '10797114'
  volume: '134'
  issue: '17'
  article_number: '176101'

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## Related item



## Funding

- identifier: 2022YFA1203400
  funder_name: National Key Research and Development Program of China
- identifier: 2023YFA1407900
  funder_name: National Key Research and Development Program of China
- identifier: '12174335'
  funder_name: National Natural Science Foundation of China
- identifier: '12074260'
  funder_name: National Natural Science Foundation of China
- identifier: LR23A040002
  funder_name: Natural Science Foundation of Zhejiang Province
- identifier: JP24K06968
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K23161
  funder_name: Japan Society for the Promotion of Science
- identifier: JP24H02218
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23H05469
  funder_name: Japan Society for the Promotion of Science
- funder_name: New York University Shanghai
- funder_name: NYU-ECNU Institute of Physics

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## Fileset

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  filename: 2408.08596v2.pdf
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## Thumbnail

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filename: 2408.08596v2.pdf