# Exciton Self-Trapping in Twisted Hexagonal Boron Nitride homostructures

https://mdr.nims.go.jp/datasets/3bf8a123-41ca-45f2-ab3c-b5f318ac6f9a

## File

- [PhysRevX.15.021067.pdf](https://mdr.nims.go.jp/filesets/72b49dde-1343-4b58-adbb-920e49288e3a/download) ([Detail](https://mdr.nims.go.jp/filesets/72b49dde-1343-4b58-adbb-920e49288e3a.md))

## Id

3bf8a123-41ca-45f2-ab3c-b5f318ac6f9a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-15T02:49:49.339707Z

## Updated at

2026-02-17T03:30:31.856766Z

## Published at

2026-02-17T00:11:01.329888Z

## Doi



## First published url

https://doi.org/10.1103/physrevx.15.021067

## Date published

2025-05-27

## Recorded date published

2025-5

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Exciton Self-Trapping in Twisted Hexagonal Boron Nitride homostructures
  title_type: original
  lang: en

## Description

- description: One of the primary interests of 2D materials is that their atomic layers
    can be assembled with various degrees of freedom, allowing for tunable excitonic
    properties. Understanding how interlayer interfaces affect excitons is crucial.
    In this study, cathodoluminescence and time-resolved cathodoluminescence reveal
    how excitons interact with the interface between two twisted hexagonal boron nitride
    (h-BN) crystals at different angles. The interface efficiently captures free excitons,
    resulting in a population of long-lived, interface-localized (2D) excitons. Temperature-dependent
    measurements show that, at large twist angles, these interface-localized excitons
    undergo self-trapping caused by lattice distortion around the exciton. This exciton-interface
    interaction is responsible for the broad 4-eV optical emission of highly twisted
    h-BN/h-BN structures. Exciton self-trapping is discussed as a common trait in
    sp²-hybridized boron nitride polytypes and nanostructures, due to the ionic nature
    of the B–N bond and the small size of the excitons.
  description_type: abstract
  lang: und

## Creator

- name: Sébastien Roux
  role: author
- name: Christophe Arnold
  role: author
- name: Etienne Carré
  role: author
- name: Alexandre Plaud
  role: author
- name: Lei Ren
  role: author
- name: Frédéric Fossard
  role: author
- name: Nicolas Horezan
  role: author
- name: Eli Janzen
  role: author
- name: James H. Edgar
  role: author
- name: Camille Maestre
  role: author
- name: Bérangère Toury
  role: author
- name: Catherine Journet
  role: author
- name: Vincent Garnier
  role: author
- name: Philippe Steyer
  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: Cédric Robert
  role: author
- name: Xavier Marie
  role: author
- name: François Ducastelle
  role: author
- name: Annick Loiseau
  role: author
- name: Julien Barjon
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: 'exciton self-trapping
    '
  schema: not_defined
- subject: 'twisted hexagonal boron nitride (h-BN)
    '
  schema: not_defined
- subject: cathodoluminescence
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-05-27

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review X
  issn: '21603308'
  volume: '15'
  issue: '2'
  article_number: '021067'

## Conference



## Related item



## Funding

- identifier: '785219'
  funder_name: Horizon 2020 Framework Programme
- identifier: '881603'
  funder_name: Horizon 2020 Framework Programme
- identifier: N00014-20-1-2474
  funder_name: Office of Naval Research
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: ANR-21-ESRE-0025
  funder_name: Agence Nationale de la Recherche

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## Chemical composition



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## Fileset

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  filename: PhysRevX.15.021067.pdf
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## Thumbnail

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filename: PhysRevX.15.021067.pdf