# Fermi Velocity Dependent Critical Current in Ballistic Bilayer Graphene Josephson Junctions

https://mdr.nims.go.jp/datasets/d5aee837-6962-4840-ab72-0699eeee4e80

## File

- [sharma-et-al-2025-fermi-velocity-dependent-critical-current-in-ballistic-bilayer-graphene-josephson-junctions.pdf](https://mdr.nims.go.jp/filesets/deecc062-1d56-4193-acbc-de7787712ac2/download) ([Detail](https://mdr.nims.go.jp/filesets/deecc062-1d56-4193-acbc-de7787712ac2.md))

## Id

d5aee837-6962-4840-ab72-0699eeee4e80

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-15T07:31:28.327762Z

## Updated at

2026-02-17T23:30:14.040706Z

## Published at

2026-02-17T08:57:19.567700Z

## Doi



## First published url

https://doi.org/10.1021/acsnanoscienceau.4c00080

## Date published

2025-04-16

## Recorded date published

2025-4-16

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Fermi Velocity Dependent Critical Current in Ballistic Bilayer Graphene Josephson
    Junctions
  title_type: original
  lang: en

## Description

- description: 'We perform transport measurements on proximitized, ballistic, bilayer
    graphene Josephson junctions (BGJJs) in the intermediate-to-long junction regime
    (L > ξ). We measure the device’s differential resistance as a function of bias
    current and gate voltage for a range of different temperatures. The extracted
    critical current IC follows an exponential trend with temperature: exp(−kBT/δE).
    Here δE = h ̄νF /2πL: an expected trend for intermediate-to-long junctions. From
    δE, we determine the Fermi velocity of the bilayer graphene, which is found to
    increase with gate voltage. Simultaneously, we show the carrier density dependence
    of δE, which is attributed to the quadratic dispersion of bilayer graphene. This
    is in contrast to single layer graphene Josephson junctions, where δE and the
    Fermi velocity are independent of the carrier density. The carrier density dependence
    in BGJJs allows for additional tuning parameters in graphene-based Josephson Junction
    devices.'
  description_type: abstract
  lang: und

## Creator

- name: Amis Sharma
  role: author
- name: Chun-Chia Chen
  role: author
- name: Jordan McCourt
  role: author
- name: Mingi Kim
  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: Leonid Rokhinson
  role: author
- name: Gleb Finkelstein
  role: author
- name: Ivan Borzenets
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: 'bilayer graphene Josephson junctions (BGJJs)
    '
  schema: not_defined
- subject: 'critical current
    '
  schema: not_defined
- subject: Fermi velocity
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-03-19

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: ACS Nanoscience Au
  issn: '26942496'
  volume: '5'
  issue: '2'
  start_page: 65
  end_page: 69

## Conference



## Related item



## Funding

- identifier: DMR-2005092
  funder_name: National Science Foundation

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: deecc062-1d56-4193-acbc-de7787712ac2
  filename: sharma-et-al-2025-fermi-velocity-dependent-critical-current-in-ballistic-bilayer-graphene-josephson-junctions.pdf
  content_type: application/pdf
  size: 2752231
  md5: e790a82f6a14ab434bfe3c621febc992

## Thumbnail

fileset_id: deecc062-1d56-4193-acbc-de7787712ac2
filename: sharma-et-al-2025-fermi-velocity-dependent-critical-current-in-ballistic-bilayer-graphene-josephson-junctions.pdf