# Large trion binding energy in monolayer WS2 via strain-enhanced electron–phonon coupling

https://mdr.nims.go.jp/datasets/8bc223ed-cc7c-4079-adef-f600a0016072

## File

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## Id

8bc223ed-cc7c-4079-adef-f600a0016072

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-03-08T04:56:46.436019Z

## Updated at

2026-03-10T07:30:11.684297Z

## Published at

2026-03-10T04:44:49.931700Z

## Doi



## First published url

https://doi.org/10.1038/s43246-025-00809-z

## Date published

2025-04-29

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Large trion binding energy in monolayer WS2 via strain-enhanced electron–phonon
    coupling
  title_type: original
  lang: en

## Description

- description: 'Transition metal dichalcogenides and related layered materials in
    their monolayer and a few layers thicknesses regime provide a promising optoelectronic
    platform for exploring the excitonic- and many-body physics. Strain engineering
    has emerged as a potent technique for tuning the excitonic emission energies favorable
    for exciton-based devices. We have investigated the effects of nanoparticle-induced
    local strain on the optical properties of exciton, X0, and trion, X-, in monolayer
    WS2. The biaxial tensile strain in the range of 0.1 - 2.0 % was quantified and
    verified by monitoring the changes in three prominent Raman modes of WS2: E12g(Γ),
    A1g, and 2LA(M). We obtained a remarkable increase of 34meV in X- binding energy
    with an average tuning rate of 17.5 ± 2.5 meV/% biaxial strain across all the
    samples irrespective of the surrounding dielectric environment of monolayer WS2
    and the sample preparation conditions. At the highest tensile strain of ≈2%, we
    have achieved the largest binding energy ≈100 meV for X-, leading to its enhanced
    emission intensity and thermal stability. By investigating strain-induced linewidth
    broadening and deformation potentials of both X0 and X- emission, we elucidate
    that the increase in X- binding energy is due to strain-enhanced electron-phonon
    coupling. This work holds relevance for future X--based nano-opto-electro-mechanical
    systems and devices.'
  description_type: abstract
  lang: und

## Creator

- name: Yunus Waheed
  role: author
- name: Sumitra Shit
  role: author
- name: Jithin T. Surendran
  role: author
- name: Indrajeet D. Prasad
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Santosh Kumar
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: " trion binding energy\L"
  schema: not_defined
- subject: 'monolayer WS2
    '
  schema: not_defined
- subject: strain-enhanced coupling
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-04-29

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Communications Materials
  issn: '26624443'
  volume: '6'
  issue: '1'
  article_number: '86'

## Conference



## Related item



## Funding

- identifier: DST/NM/TUE/QM-2/2019
  funder_name: Nano Mission Council, Department of Science and Technology

## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Process for specimen treatment



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## Fileset

- id: ae667605-aa27-4617-89df-267f008f5171
  filename: s43246-025-00809-z.pdf
  content_type: application/pdf
  size: 1289907
  md5: e818f0d9eff39ab31adf65014fd3e46f

## Thumbnail

fileset_id: ae667605-aa27-4617-89df-267f008f5171
filename: s43246-025-00809-z.pdf