# Electronic ferroelectricity in monolayer graphene moiré superlattices

https://mdr.nims.go.jp/datasets/9d89189e-b855-49f9-9023-a1185d4bb8e2

## File

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## Id

9d89189e-b855-49f9-9023-a1185d4bb8e2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T01:44:21.079597Z

## Updated at

2025-02-05T03:31:45.150574Z

## Published at

2025-02-05T03:31:45.218122Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-55281-z

## Date published

2024-12-30

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Electronic ferroelectricity in monolayer graphene moiré superlattices
  title_type: original
  lang: en

## Description

- description: Ferroelectricity is intriguing for its spontaneous electric polarization,
    which is switchable by an external electric field. Expanding ferroelectric materials
    to two-dimensional limit will provide versatile applications for the development
    of next-generation nonvolatile devices [1-3]. Conventional ferroelectricity requires
    the materials consisting of at least two constituent elements associated with
    polar crystalline structures. Monolayer graphene as an elementary two-dimensional
    material unlikely exhibits ferroelectric order due to its highly centrosymmetric
    hexagonal lattices. Nevertheless, two-dimensional moiré superlattices offer a
    powerful way to engineer diverse electronic orders in non-polar materials [4-7].
    Here, we report the observations of electronic ferroelectricity in monolayer graphene
    by introducing asymmetric moiré superlattice at the graphene/h-BN interface. Utilizing
    Hall measurements, the electric polarization is identified to stem from electron-hole
    dipoles, suggesting the electronic dynamics of the observed ferroelectricity.
    Standard polarization-electric field hysteresis loops, as well as unconventional
    multiple switchable polarization states, have been achieved. By in-situ comparing
    with control devices, we found that the electronic ferroelectricity in graphene
    moiré systems is independent of layer number of graphene and the corresponding
    fine band structures. Furthermore, we demonstrate the applications of this ferroelectric
    moiré structures in multi-state non-volatile data storage and the emulation of
    versatile synaptic behaviors, including short-term plasticity, long-term potentiation
    and long-term depression. This work not only enriches the fundamental understanding
    of ferroelectricity, but also demonstrates the promising applications of graphene
    in multi-state memories and neuromorphic computing.
  description_type: abstract
  lang: und

## Creator

- name: Le Zhang
  role: author
  orcid: https://orcid.org/0000-0001-8211-9715
- name: Jing Ding
  role: author
  orcid: https://orcid.org/0009-0009-7678-7675
- name: Hanxiao Xiang
  role: author
- name: Naitian Liu
  role: author
- name: Wenqiang Zhou
  role: author
  orcid: https://orcid.org/0009-0004-2862-3776
- name: Linfeng Wu
  role: author
- name: Na Xin
  role: author
  orcid: https://orcid.org/0000-0002-9293-3056
- 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: Shuigang Xu
  role: author
  orcid: https://orcid.org/0000-0002-0589-5291

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Ferroelectric materials
  schema: not_defined
- subject: monolayer graphene
  schema: not_defined
- subject: moiré superlattice
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '10905'

## Conference



## Related item



## Funding

- identifier: '12274354'
  funder_name: National Natural Science Foundation of China
- identifier: XHD23A2001
  funder_name: Natural Science Foundation of Zhejiang Province
- identifier: LR24A040003
  funder_name: Natural Science Foundation of Zhejiang Province
- identifier: ZJ2023077
  funder_name: Natural Science Foundation of Zhejiang Province

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## Fileset

- id: 5bc56805-44d6-4f1c-aa99-9590a9f585b2
  filename: s41467-024-55281-z.pdf
  content_type: application/pdf
  size: 3838096
  md5: 55dcb3cbd94635ec128c3380c5c2de23

## Thumbnail

fileset_id: 5bc56805-44d6-4f1c-aa99-9590a9f585b2
filename: s41467-024-55281-z.pdf