# Electrically driven amplification of terahertz acoustic waves in graphene

https://mdr.nims.go.jp/datasets/31ce91eb-7fa4-4b37-8e76-e2e3b5ce9d67

## File

- [s41467-024-46819-2.pdf](https://mdr.nims.go.jp/filesets/84dc89f6-6055-4bdb-8e68-34740aa49ed5/download) ([Detail](https://mdr.nims.go.jp/filesets/84dc89f6-6055-4bdb-8e68-34740aa49ed5.md))

## Id

31ce91eb-7fa4-4b37-8e76-e2e3b5ce9d67

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-07T06:01:21.683658Z

## Updated at

2025-02-07T07:30:58.332041Z

## Published at

2025-02-07T07:30:58.398978Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-46819-2

## Date published

2024-03-21

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Electrically driven amplification of terahertz acoustic waves in graphene
  title_type: original
  lang: en

## Description

- description: In graphene devices, the electronic drift velocity can easily exceed
    the speed of sound in the material at moderate current biases. Under this condition,
    the electronic system can efficiently amplify acoustic phonons, leading to the
    exponential growth of sound waves in the direction of the carrier flow. Here,
    we demonstrate that such phonon amplification can significantly modify the electrical
    properties of graphene devices. We observe a super-linear growth of the resistivity
    in the direction of the carrier flow when the drift velocity exceeds the speed
    of sound, causing up to a 7 times increase over 8 micrometers. The resistance
    growth is observable for carrier densities away from the Dirac point and is enhanced
    at cryogenic temperatures. These observations are explained by a theoretical model
    for the electrical-amplification of acoustic phonons, which reach frequencies
    up to 2.2 terahertz with the nanoscale wavelength set by gate-tunable ~kF transitions
    across the Fermi surface. These findings offer a route to high-frequency on-chip
    sound generation and detection, which can be used to modulate and probe electronic
    physics in van der Waals heterostructures in the terahertz frequency range.
  description_type: abstract
  lang: und

## Creator

- name: Aaron H. Barajas-Aguilar
  role: author
- name: Jasen Zion
  role: author
- name: Ian Sequeira
  role: author
- name: Andrew Z. Barabas
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Eric B. Barrett
  role: author
- name: Thomas Scaffidi
  role: author
- name: Javier D. Sanchez-Yamagishi
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Graphene devices
  schema: not_defined
- subject: phonon amplification
  schema: not_defined
- subject: resistivity growth
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '2550'

## Conference



## Related item



## Funding

- identifier: DMR-2046849
  funder_name: National Science Foundation
- funder_name: University of California Institute for Mexico and the United States
- funder_name: UCI Eddleman Quantum Institute

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Fileset

- id: 84dc89f6-6055-4bdb-8e68-34740aa49ed5
  filename: s41467-024-46819-2.pdf
  content_type: application/pdf
  size: 1354869
  md5: 1afb7fa2ecfa6a204c42a7cefb0020cc

## Thumbnail

fileset_id: 84dc89f6-6055-4bdb-8e68-34740aa49ed5
filename: s41467-024-46819-2.pdf