# Viscous Hall effect in graphene superlattice enabled via proximity screening

https://mdr.nims.go.jp/datasets/fe7b2936-7e63-430e-bb74-0d293caba500

## File

- [2025A01509G_revised main text (clean).pdf](https://mdr.nims.go.jp/filesets/dc3a9ee7-48f6-4559-8297-1640d39bf6dc/download) ([Detail](https://mdr.nims.go.jp/filesets/dc3a9ee7-48f6-4559-8297-1640d39bf6dc.md))

## Id

fe7b2936-7e63-430e-bb74-0d293caba500

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-24T07:29:18.831833Z

## Updated at

2026-06-26T08:26:31.481549Z

## Published at

2026-06-26T09:28:48.997654Z

## Doi



## First published url

https://doi.org/10.1103/mvtf-mbvq

## Date published

2025-11-04

## Recorded date published

2025-11

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Viscous Hall effect in graphene superlattice enabled via proximity screening
  title_type: original
  lang: en

## Description

- description: In electronic systems with strong electron-electron interactions, charge
    carriers can exhibit fluidlike behavior governed by viscosity. While such hydrodynamic
    regimes have been observed in pristine graphene, realizing similar behavior in
    moiré superlattices has been challenging due to enhanced momentum-relaxing umklapp
    electron-electron scattering. Here, we show that placing a graphene/hBN superlattice
    in close proximity to a conductive screening layer suppresses umklapp momentum
    relaxation, creating favorable conditions for the observation of viscous electron
    flow. The hydrodynamic response near the first Dirac point remains largely insensitive
    to the moiré potential, allowing clear observation of the viscous Hall effect
    and extraction of the electron-electron scattering length. These results identify
    proximity screening as a practical route to tune scattering processes and enable
    quantitative measurement of electron viscosity in moiré superlattices. In contrast,
    transport near the secondary Dirac points is strongly affected by narrow bandwidth,
    which hinders reliable measurements of the viscous Hall effect in this regime.
    This limitation highlights the need for multicomponent hydrodynamic frameworks
    to describe narrow-bandwidth moiré systems.
  description_type: abstract
  lang: en

## Creator

- name: San Kim
  role: author
- name: Sang Hyeon Park
  role: author
- name: Sang Il Ahn
  role: author
- name: Shuigang Xu
  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: Minsoo Kim
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Hydrodynamic electron transport
  schema: not_defined
- subject: Moiré superlattice
  schema: not_defined
- subject: Graphene
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: 1550235X
  volume: '112'
  issue: '20'
  article_number: L201404

## Conference



## Related item



## Funding

- funder_name: National Research Foundation of Korea
- identifier: RS-2024–00444725
  funder_name: Ministry of Science and ICT, South Korea
- identifier: RS-2022-NR071693
  funder_name: Ministry of Science and ICT, South Korea
- identifier: RS-2023–00303081
  funder_name: Ministry of Science and ICT, South Korea
- identifier: RS-2024–00410027
  funder_name: Ministry of Science and ICT, South Korea
- identifier: XHD23A2001
  funder_name: Natural Science Foundation of Zhejiang Province
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJCR24A5
  funder_name: Japan Society for the Promotion of Science
- funder_name: Japan Science and Technology Corporation
- funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



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## Instrument managing organization



## Measurement method



## Specimen



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## Fileset

- id: dc3a9ee7-48f6-4559-8297-1640d39bf6dc
  filename: 2025A01509G_revised main text (clean).pdf
  content_type: application/pdf
  size: 596840
  md5: 3d705bea0198eb958b5d0a0791b3de5c

## Thumbnail

fileset_id: dc3a9ee7-48f6-4559-8297-1640d39bf6dc
filename: 2025A01509G_revised main text (clean).pdf