# Built-in Bernal gap in large-angle-twisted monolayer-bilayer graphene

https://mdr.nims.go.jp/datasets/d56c4b80-cefd-4a9b-bce3-8d854ada0049

## File

- [s42005-024-01887-0.pdf](https://mdr.nims.go.jp/filesets/652335a2-e0e4-410f-88fa-25b480916273/download) ([Detail](https://mdr.nims.go.jp/filesets/652335a2-e0e4-410f-88fa-25b480916273.md))

## Id

d56c4b80-cefd-4a9b-bce3-8d854ada0049

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-06T06:40:49.214298Z

## Updated at

2025-02-07T03:30:26.912656Z

## Published at

2025-02-07T03:30:27.109994Z

## Doi



## First published url

https://doi.org/10.1038/s42005-024-01887-0

## Date published

2024-12-01

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Built-in Bernal gap in large-angle-twisted monolayer-bilayer graphene
  title_type: original
  lang: en

## Description

- description: Atomically thin materials offer multiple opportunities for layer-by-layer
    control of their electronic properties. While monolayer graphene (MLG) is a zero-gap
    system, Bernal-stacked bilayer graphene (BLG) acquires a finite band gap when
    the symmetry between the layers’ potential energy is broken, usually, via a large
    electric field applied in double-gate devices. Here, we introduce an asymmetric
    twistronic stack comprising both MLG and BLG, synthesized via low-pressure chemical
    vapor deposition (LP-CVD) on Cu. Although a large (~30°) twist angle decouples
    the MLG and BLG electronic bands near Fermi level, we find that the layer degeneracy
    in the BLG subsystem is lifted, producing a gap in the absence of external fields.
    The built-in interlayer asymmetry originates from proximity-induced energy shifts
    in the outermost layers and requires a displacement field of 0.14 V/nm to be compensated.
    The latter corresponds to a ~10 meV intrinsic BLG gap, a value confirmed by our
    thermal-activation measurements. The present results highlight the role of structural
    asymmetry and encapsulating environment, expanding the engineering toolbox for
    monolithically-grown graphene multilayers.
  description_type: abstract
  lang: und

## Creator

- name: Alex Boschi
  role: author
  orcid: https://orcid.org/0000-0001-7562-7340
- name: Zewdu M. Gebeyehu
  role: author
- name: Sergey Slizovskiy
  role: author
  orcid: https://orcid.org/0000-0003-0131-0775
- name: Vaidotas Mišeikis
  role: author
  orcid: https://orcid.org/0000-0001-6263-4250
- name: Stiven Forti
  role: author
  orcid: https://orcid.org/0000-0002-8939-3175
- name: Antonio Rossi
  role: author
  orcid: https://orcid.org/0000-0003-4574-7215
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: Fabio Beltram
  role: author
- name: Vladimir I. Fal’ko
  role: author
  orcid: https://orcid.org/0000-0003-0828-0310
- name: Camilla Coletti
  role: author
  orcid: https://orcid.org/0000-0002-8134-7633
- name: Sergio Pezzini
  role: author
  orcid: https://orcid.org/0000-0003-4289-907X

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Twistronic stack
  schema: not_defined
- subject: Bernal-stacked bilayer graphene
  schema: not_defined
- subject: chemical vapor deposition
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Communications Physics
  issn: '23993650'
  volume: '7'
  issue: '1'
  article_number: '391'

## Conference



## Related item



## Funding

- identifier: PE00000023 – NQSTI
  funder_name: Ministero dell'Istruzione, dell'Università e della Ricerca

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Process for specimen treatment



## Computational method



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## Fileset

- id: 652335a2-e0e4-410f-88fa-25b480916273
  filename: s42005-024-01887-0.pdf
  content_type: application/pdf
  size: 1619697
  md5: 797af35056a4ad146dcc4ad2ce4e66ae

## Thumbnail

fileset_id: 652335a2-e0e4-410f-88fa-25b480916273
filename: s42005-024-01887-0.pdf