# Excitonic Linewidth Approaching the Homogeneous Limit in MoS2-Based van der Waals Heterostructures

https://mdr.nims.go.jp/datasets/10499200-b4cb-4ecc-a0d4-c7e18ad2604b

## File

- [PhysRevX.7.021026.pdf](https://mdr.nims.go.jp/filesets/c0f33909-7c2d-4da1-b513-e267112a39a2/download) ([Detail](https://mdr.nims.go.jp/filesets/c0f33909-7c2d-4da1-b513-e267112a39a2.md))

## Id

10499200-b4cb-4ecc-a0d4-c7e18ad2604b

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-27T07:29:30.304049Z

## Updated at

2025-02-28T07:30:37.846656Z

## Published at

2025-02-28T07:30:37.925894Z

## Doi



## First published url

https://doi.org/10.1103/physrevx.7.021026

## Date published

2017-05-18

## Recorded date published

2017-5

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Excitonic Linewidth Approaching the Homogeneous Limit in MoS2-Based van der
    Waals Heterostructures
  title_type: original
  lang: en

## Description

- description: The strong light-matter interaction and the valley selective optical
    selection rules make monolayer (ML) MoS2 an exciting 2D material for fundamental
    physics and optoelectronics applications. But, so far, optical transition linewidths
    even at low temperature are typically as large as a few tens of meV and contain
    homogeneous and inhomogeneous contributions. This prevented in-depth studies,
    in contrast to the better- characterized ML materials MoSe2 and WSe2. In this
    work, we show that encapsulation of ML MoS2 in hexagonal boron nitride can efficiently
    suppress the inhomogeneous contribution to the exciton linewidth, as we measure
    in photoluminescence and reflectivity a FWHM down to 2 meV at T 1⁄4 4 K. Narrow
    optical transition linewidths are also observed in encapsulated WS2, WSe2, and
    MoSe2 MLs. This indicates that surface protection and substrate flatness are key
    ingredients for obtaining stable, high-quality samples. Among the new possibilities
    offered by the well-defined optical transitions, we measure the homogeneous broadening
    induced by the interaction with phonons in temperature-dependent experiments.
    We uncover new information on spin and valley physics and present the rotation
    of valley coherence in applied magnetic fields perpendicular to the ML.
  description_type: abstract
  lang: und

## Creator

- name: F. Cadiz
  role: author
- name: E. Courtade
  role: author
- name: C. Robert
  role: author
- name: G. Wang
  role: author
- name: Y. Shen
  role: author
- name: H. Cai
  role: author
- name: T. Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: K. Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: H. Carrere
  role: author
- name: D. Lagarde
  role: author
- name: M. Manca
  role: author
- name: T. Amand
  role: author
- name: P. Renucci
  role: author
- name: S. Tongay
  role: author
- name: X. Marie
  role: author
- name: B. Urbaszek
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Monolayer
  schema: not_defined
- subject: molybdenum disulfide
  schema: not_defined
- subject: optical properties
  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: '7'
  issue: '2'
  article_number: '021026'

## Conference



## Related item



## Funding

- identifier: '306719'
  funder_name: H2020 European Research Council
- identifier: ANR-11-IDEX-0002-02
  funder_name: Agence Nationale de la Recherche
- identifier: ANR-10- LABX-0037-NEXT
  funder_name: Agence Nationale de la Recherche
- funder_name: Institut Universitaire de France
- identifier: DMR-1552220
  funder_name: National Science Foundation
- identifier: CMMI-1561839
  funder_name: National Science Foundation
- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: JP26248061
  funder_name: Japan Society for the Promotion of Science
- identifier: JP15K21722
  funder_name: Japan Society for the Promotion of Science
- identifier: JP25106006
  funder_name: Japan Society for the Promotion of Science
- identifier: '676108'
  funder_name: Marie Sklodowska-Curie

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## Fileset

- id: c0f33909-7c2d-4da1-b513-e267112a39a2
  filename: PhysRevX.7.021026.pdf
  content_type: application/pdf
  size: 4879907
  md5: da813f920c243ee94e21df1047982c69

## Thumbnail

fileset_id: c0f33909-7c2d-4da1-b513-e267112a39a2
filename: PhysRevX.7.021026.pdf