# Observation of anomalous amplitude modes in the kagome metal CsV3Sb5

https://mdr.nims.go.jp/datasets/3eb9bee9-a3aa-47e1-812b-7cad6fc0d61b

## File

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## Id

3eb9bee9-a3aa-47e1-812b-7cad6fc0d61b

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-26T06:40:12.283496Z

## Updated at

2025-02-27T03:30:48.539484Z

## Published at

2025-02-27T03:30:48.670216Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-31162-1

## Date published

2022-06-16

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Observation of anomalous amplitude modes in the kagome metal CsV3Sb5
  title_type: original
  lang: en

## Description

- description: The charge-density wave (CDW) phase is often accompanied by the condensation
    of a soft acoustic phonon mode, giving rise to lattice distortion and charge density
    modulation. This picture was challenged for the recently discovered kagome metal
    CsV3Sb5, based on the evidence of absence of soft phonons. Here we report the
    observation of Raman-active CDW amplitude modes in this ma- terial, which are
    collective excitations typically thought to emerge out of frozen soft phonons.
    The amplitude modes strongly hybridize with other superlattice modes, imparting
    them with clear temperature-dependent frequency shift and broadening, rarely seen
    in other known CDW materials. Both the mode mixing and the large amplitude mode
    frequencies suggest that the CDW exhibits the character of strong electron-phonon
    coupling, a regime in which acoustic phonon softening can cease to exist. The
    observation of amplitude modes in the absence of soft phonons highlights the unconventional
    nature of the CDW in CsV3Sb5.
  description_type: abstract
  lang: und

## Creator

- name: Gan Liu
  role: author
- name: Xinran Ma
  role: author
- name: Kuanyu He
  role: author
- name: Qing Li
  role: author
- name: Hengxin Tan
  role: author
- name: Yizhou Liu
  role: author
- name: Jie Xu
  role: author
- name: Wenna Tang
  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: Libo Gao
  role: author
- name: Yaomin Dai
  role: author
- name: Hai-Hu Wen
  role: author
- name: Binghai Yan
  role: author
- name: Xiaoxiang Xi
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Kagome lattice
  schema: not_defined
- subject: charge-density wave
  schema: not_defined
- subject: electron-phonon coupling
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '3461'

## Conference



## Related item



## Funding

- identifier: '11774151'
  funder_name: National Natural Science Foundation of China

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: a5247572-9265-4e4f-b388-6dd0954e78e2
  filename: s41467-022-31162-1.pdf
  content_type: application/pdf
  size: 1718836
  md5: 37c2b5a6ab208eedce3868a1e4940f6e

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filename: s41467-022-31162-1.pdf