# Tuning moiré excitons and correlated electronic states through layer degree of freedom

https://mdr.nims.go.jp/datasets/e5b1d365-b565-47f9-bad8-a98763ad782f

## File

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## Id

e5b1d365-b565-47f9-bad8-a98763ad782f

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-26T02:09:59.786782Z

## Updated at

2025-02-26T23:30:33.441677Z

## Published at

2025-02-26T23:30:33.543089Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-32493-9

## Date published

2022-08-16

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Tuning moiré excitons and correlated electronic states through layer degree
    of freedom
  title_type: original
  lang: en

## Description

- description: Moiré coupling in transition metal dichalcogenides (TMDCs) superlattices
    introduces flat minibands that enable strong electronic correlation and fascinating
    correlated states, and it also modifies the strong Coulomb interaction driven
    excitons and gives rise to moiré excitons. Here, we introduce the layer degree
    of freedom to the WSe2/WS2 moiré superlattice by changing WSe2 from monolayer
    to bilayer and trilayer. We observe systematic changes of optical spectra of the
    moiré excitons, which directly confirm the highly interfacial nature of moiré
    coupling at the WSe2/WS2 interface. In addition, the energy resonances of moiré
    excitons are modified, and their separations are significantly increased in multilayer
    WSe2/ monolayer WS2 moiré superlattice, revealing intriguing hybridization between
    moiré excitons in the WSe2 layer interfacing WS2 and intralayer excitons in the
    added WSe2 layer(s). The additional WSe2 layers also reduce the electronic correlation
    strength, evidenced by the reduced Mott transition temperature and disappearance
    of correlated insulating states at fractional fillings. The modulation of both
    moiré excitons and correlated electronic states at the increased number of WSe2
    layers can be well described by our theoretical model. Our study presents a new
    method to tune the strong electronic correlation and moiré exciton bands in the
    TMDCs moiré superlattices, ushering in an exciting platform to engineer quantum
    phenomena stemming from strong correlation and Coulomb interaction.
  description_type: abstract
  lang: und

## Creator

- name: Dongxue Chen
  role: author
- name: Zhen Lian
  role: author
- name: Xiong Huang
  role: author
- name: Ying Su
  role: author
- name: Mina Rashetnia
  role: author
- name: Li Yan
  role: author
- name: Mark Blei
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Sefaattin Tongay
  role: author
- name: Zenghui Wang
  role: author
- name: Chuanwei Zhang
  role: author
- name: Yong-Tao Cui
  role: author
- name: Su-Fei Shi
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Moiré coupling
  schema: not_defined
- subject: transition metal dichalcogenides
  schema: not_defined
- subject: excitons
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '4810'

## Conference



## Related item



## Funding

- identifier: FA9550-20-1-0179
  funder_name: United States Department of Defense | United States Air Force | AFMC
    | Air Force Office of Scientific Research
- identifier: DMR-1945420
  funder_name: National Science Foundation
- identifier: DMR-2104902
  funder_name: National Science Foundation

## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 19f59a2f-fd61-459a-ba82-4c18c0e51811
  filename: s41467-022-32493-9.pdf
  content_type: application/pdf
  size: 2968857
  md5: c5216551223a90b1137a1e0cc627b09f

## Thumbnail

fileset_id: 19f59a2f-fd61-459a-ba82-4c18c0e51811
filename: s41467-022-32493-9.pdf