# Interplay of valley, layer and band topology towards interacting quantum phases in moiré bilayer graphene

https://mdr.nims.go.jp/datasets/824c6362-e4ca-4532-8f74-8e791671fefd

## File

- [s41467-024-50475-x.pdf](https://mdr.nims.go.jp/filesets/644def10-c340-4ced-b783-f4faafe45246/download) ([Detail](https://mdr.nims.go.jp/filesets/644def10-c340-4ced-b783-f4faafe45246.md))

## Id

824c6362-e4ca-4532-8f74-8e791671fefd

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T04:33:02.920081Z

## Updated at

2025-02-05T07:30:30.494939Z

## Published at

2025-02-05T07:30:30.586232Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-50475-x

## Date published

2024-07-28

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Interplay of valley, layer and band topology towards interacting quantum
    phases in moiré bilayer graphene
  title_type: original
  lang: en

## Description

- description: "In Bernal-stacked bilayer graphene (BBG), the Landau levels give rise
    to an intimate connection between valley and layer degrees of freedom. Adding
    a\r\nmoiré superlattice potential enriches the BBG physics with the formation
    of topological minibands — potentially leading to tunable exotic quantum transport.
    Here, we present magnetotransport measurements of a high-quality bilayer graphene–hexagonal
    boron nitride (hBN) heterostructure. The zero- degree alignment generates a strong
    moiré superlattice potential for the electrons in BBG and the resulting Landau
    fan diagram of longitudinal and Hall resistance displays a Hofstadter butterfly
    pattern with a high level of detail. We demonstrate that the intricate relationship
    between valley and layer degrees of freedom controls the topology of moiré-induced
    bands, significantly influen- cing the energetics of interacting quantum phases
    in the BBG superlattice. We further observe signatures of field-induced correlated
    insulators, helical edge states and clear quantizations of interaction-driven
    topological quantum phases, such as symmetry broken Chern insulators."
  description_type: abstract
  lang: und

## Creator

- name: Yungi Jeong
  role: author
  orcid: https://orcid.org/0000-0001-5709-208X
- name: Hangyeol Park
  role: author
- name: Taeho Kim
  role: author
  orcid: https://orcid.org/0009-0007-3480-3222
- 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: Jeil Jung
  role: author
  orcid: https://orcid.org/0000-0003-2523-0905
- name: Joonho Jang
  role: author
  orcid: https://orcid.org/0000-0003-4380-102X

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Bilayer graphene
  schema: not_defined
- subject: Landau levels
  schema: not_defined
- subject: topological minibands
  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: '6351'

## Conference



## Related item



## Funding

- identifier: 2019R1C1C1006520
  funder_name: National Research Foundation of Korea
- identifier: 2020R1A5A1016518
  funder_name: National Research Foundation of Korea
- identifier: RS-2023-00258359
  funder_name: National Research Foundation of Korea
- identifier: 21H05233
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: 21H05233
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: MEXT | Japan Society for the Promotion of Science

## Instrument



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## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Specific property for specimen



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## Computational method



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## Fileset

- id: 644def10-c340-4ced-b783-f4faafe45246
  filename: s41467-024-50475-x.pdf
  content_type: application/pdf
  size: 3722209
  md5: 27361d1da04a18deda52378204f0ca04

## Thumbnail

fileset_id: 644def10-c340-4ced-b783-f4faafe45246
filename: s41467-024-50475-x.pdf