# Direct probing of energy gaps and bandwidth in gate-tunable flat band graphene systems

https://mdr.nims.go.jp/datasets/fb61a423-a967-4a56-af55-ec0090a36e9e

## File

- [s41467-025-56141-0.pdf](https://mdr.nims.go.jp/filesets/53de3aa0-e92c-43b3-b6e7-600e2672782f/download) ([Detail](https://mdr.nims.go.jp/filesets/53de3aa0-e92c-43b3-b6e7-600e2672782f.md))

## Id

fb61a423-a967-4a56-af55-ec0090a36e9e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-14T11:46:38.068354Z

## Updated at

2026-02-16T23:30:16.615278Z

## Published at

2026-02-16T09:00:53.670057Z

## Doi



## First published url

https://doi.org/10.1038/s41467-025-56141-0

## Date published

2025-02-03

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Direct probing of energy gaps and bandwidth in gate-tunable flat band graphene
    systems
  title_type: original
  lang: en

## Description

- description: Moiré systems featuring flat electronic bands exhibit a vast landscape
    of emergent exotic quantum states, making them one of the resourceful platforms
    in condensed matter physics. Tuning these systems via twist angle and the electric
    field greatly enhances our comprehension of their strongly correlated ground states.
    Here, we report a technique to investigate the nuanced intricacies of band structures
    in dual-gated multilayer graphene systems. We utilize the Landau levels of a decoupled
    monolayer graphene to extract the electric field-dependent bilayer graphene charge
    neutrality point gap. Then, we extend this method to analyze the evolution of
    the band gap and the flat bandwidth in twisted mono-bilayer graphene. The band
    gap maximizes at the same displacement field where the flat bandwidth minimizes,
    concomitant with the emergence of a strongly correlated phase. Moreover, we extract
    integer and fractional quantum Hall gaps to further demonstrate the strength of
    this method. Our technique gives a new perspective and paves the way for improving
    the understanding of electronic band structure in versatile flat band systems.
  description_type: abstract
  lang: und

## Creator

- name: Jin Jiang
  role: author
- name: Qixuan Gao
  role: author
- name: Zekang Zhou
  role: author
- name: Cheng Shen
  role: author
- name: Mario Di Luca
  role: author
- name: Emily Hajigeorgiou
  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: Mitali Banerjee
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: flat band systems
  schema: not_defined
- subject: graphene
  schema: not_defined
- subject: 'energy gaps
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/
  date_licensed: 2025-02-03

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '16'
  issue: '1'
  article_number: '1308'

## Conference



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## Instrument



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: 53de3aa0-e92c-43b3-b6e7-600e2672782f
  filename: s41467-025-56141-0.pdf
  content_type: application/pdf
  size: 2854940
  md5: 00f069a481c09da2593d7c6827f9d974

## Thumbnail

fileset_id: 53de3aa0-e92c-43b3-b6e7-600e2672782f
filename: s41467-025-56141-0.pdf