# Optical signatures of interlayer electron coherence in a bilayer semiconductor

https://mdr.nims.go.jp/datasets/1420dfe5-7caf-4a8f-a8a7-30674ce2d801

## File

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## Id

1420dfe5-7caf-4a8f-a8a7-30674ce2d801

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-05-04T07:15:35.103359Z

## Updated at

2026-05-11T04:34:46.810773Z

## Published at

2026-05-11T07:25:05.546592Z

## Doi



## First published url

https://doi.org/10.1038/s41567-025-02971-0

## Date published

2025-08-20

## Recorded date published

2025-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Optical signatures of interlayer electron coherence in a bilayer semiconductor
  title_type: original
  lang: en

## Description

- description: Emergent strongly-correlated electronic phenomena in atomically-thin
    transition metal dichalcogenides are an exciting frontier in condensed matter
    physics, with examples ranging from bilayer superconductivity [1] and electronic
    Wigner crystals [2, 3] to the ongoing quest for exciton condensation [4–6]. Here,
    we experimentally investigate the properties of indirect excitons in naturally-grown
    MoS2 -homobilayer, integrated in a dual-gate device structure allowing independent
    control of the electron density and out-of-plane electric field. Under conditions
    when electron tunneling between the layers is negligible [7], upon electron doping
    the sample, we ob- serve that the two excitons with opposing dipoles hybridize,
    displaying unusual behavior distinct from both conventional level crossing and
    anti- crossing. We show that these observations can be explained by static random
    coupling between the excitons, which increases with electron density and decreases
    with temperature. We argue that this phenomenon is indicative of a spatially fluctuating
    order parameter in the form of inter- layer electron coherence, a theoretically
    predicted many-body state [8] that has yet to be unambiguously established experimentally
    outside of the quantum Hall regime [6, 9–14]. Implications of our findings for
    future experiments and quantum optics applications are discussed.
  description_type: abstract
  lang: und

## Creator

- name: Xiaoling Liu
  role: author
- name: Nadine Leisgang
  role: author
- name: Pavel E. Dolgirev
  role: author
- name: Alexander A. Zibrov
  role: author
- name: Jiho Sung
  role: author
- name: Jue Wang
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Valentin Walther
  role: author
- name: Hongkun Park
  role: author
- name: Eugene Demler
  role: author
- name: Philip Kim
  role: author
- name: Mikhail D. Lukin
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: interlayer electron coherence
  schema: not_defined
- subject: 'bilayer semiconductor
    '
  schema: not_defined
- subject: 'MoS2 homobilayers
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-08-20

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Physics
  issn: '17452481'
  volume: '21'
  issue: '10'
  start_page: 1563
  end_page: 1569

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## Fileset

- id: f2d5d219-e86b-48b9-8fa7-6a3bd5369f9e
  filename: s41567-025-02971-0.pdf
  content_type: application/pdf
  size: 1782481
  md5: ca316e736d42a3d30b50c8500cbf86a3

## Thumbnail

fileset_id: f2d5d219-e86b-48b9-8fa7-6a3bd5369f9e
filename: s41567-025-02971-0.pdf