# Optically Probing the Asymmetric Interlayer Coupling in Rhombohedral-Stacked <math display="inline">  <mrow>    <msub>      <mrow>        <mi>MoS</mi>      </mrow>      <mrow>        <mn>2</mn>      </mrow>    </msub>  </mrow></math> Bilayer

https://mdr.nims.go.jp/datasets/89f3190f-5624-43f2-add9-4ee00883ac96

## Files

- [PhysRevX.12.041005.pdf](https://mdr.nims.go.jp/filesets/e770e5a5-2862-4484-a2c6-a65785b4d006/download) ([Detail](https://mdr.nims.go.jp/filesets/e770e5a5-2862-4484-a2c6-a65785b4d006.md))

## Id

89f3190f-5624-43f2-add9-4ee00883ac96

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-27T07:05:30.518133Z

## Updated at

2025-02-28T07:30:26.942103Z

## Published at

2025-02-28T07:30:27.059796Z

## Doi



## First published url

https://doi.org/10.1103/physrevx.12.041005

## Date published

2022-10-14

## Recorded date published

2022-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Optically Probing the Asymmetric Interlayer Coupling in Rhombohedral-Stacked
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>MoS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
    Bilayer
  title_type: original
  lang: en

## Description

- description: The interlayer coupling is emerging as a new parameter for tuning the
    physical properties of two- dimensional (2D) van der Waals materials. When two
    identical semiconductor monolayers are stacked with a twist angle, the periodic
    interlayer coupling modulation due to the moire ́ superlattice may endow exotic
    physical phenomena, such as moire ́ excitons and correlated electronic phases.
    To gain insight into these new phenomena, it is crucial to unveil the underlying
    coupling between atomic layers. Recently, the rhombohedral-stacked transition
    metal dichalcogenide (TMD) bilayer has attracted significant interest because
    of the emergence of an out-of-plane polarization from nonferroelectric monolayer
    constituents. However, as a key parameter responsible for the physical properties,
    the interlayer coupling and its relationship with ferroelectricity remain elusive.
    Here, we probe the asymmetric interlayer coupling between the conduction band
    of one layer and the valence band from the other layer in a 3R-MoS2 bilayer, which
    can be understood as a result of a layer-dependent Berry phase winding. By performing
    optical spectroscopy in a dual-gated device, we show an effective type-II band
    alignment exists at K points in the 3R-MoS2 bilayer. Furthermore, by unraveling
    various contributions to the band offset, we quantitatively determine the asymmetric
    interlayer coupling and spontaneous polarization in 3R-MoS2. Our results unveil
    the physical nature of stacking-induced ferroelectricity in TMD homostructures
    and have important implications for moire ́ physics in 2D semiconductors.
  description_type: abstract
  lang: und

## Creator

- name: Jing Liang
  role: author
- name: Dongyang Yang
  role: author
- name: Jingda Wu
  role: author
- name: Jerry I. Dadap
  role: author
- 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: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Ziliang Ye
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Interlayer coupling
  schema: not_defined
- subject: ferroelectricity
  schema: not_defined
- subject: 3R-MoS2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review X
  issn: '21603308'
  volume: '12'
  issue: '4'
  article_number: '041005'

## Conference



## Related item



## Funding

- funder_name: Natural Sciences and Engineering Research Council of Canada
- funder_name: Canada Foundation for Innovation
- funder_name: Canada First Research Excellence Fund
- funder_name: Canada Research Chairs
- funder_name: New Frontiers in Research Fund
- funder_name: Max Planck–UBC–UTokyo Centre for Quantum Materials

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: e770e5a5-2862-4484-a2c6-a65785b4d006
  filename: PhysRevX.12.041005.pdf
  content_type: application/pdf
  size: 1135951
  md5: 9f3643a26f0c8fa274eec557d701c58e

## Thumbnail

fileset_id: e770e5a5-2862-4484-a2c6-a65785b4d006
filename: PhysRevX.12.041005.pdf