# Hierarchical spectral inhomogeneity in photoluminescence of a twisted MoSe2/WSe2 heterobilayer moiré superlattice revealed by hyperspectral mapping

https://mdr.nims.go.jp/datasets/156b8a87-9194-4e04-85e4-bec129d4f8f8

## File

- [manuscript_hyperspectral.pdf](https://mdr.nims.go.jp/filesets/967bf750-5b1a-469a-b3f2-ac9bed3e12c3/download) ([Detail](https://mdr.nims.go.jp/filesets/967bf750-5b1a-469a-b3f2-ac9bed3e12c3.md))

## Id

156b8a87-9194-4e04-85e4-bec129d4f8f8

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-09T05:11:17.140106Z

## Updated at

2026-06-10T00:45:26.647209Z

## Published at

2026-06-10T04:14:14.917845Z

## Doi

https://doi.org/10.48505/nims.6330

## First published url

https://doi.org/10.1063/5.0335306

## Date published

2026-06-08

## Recorded date published

2026-6-8

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Hierarchical spectral inhomogeneity in photoluminescence of a twisted MoSe2/WSe2
    heterobilayer moiré superlattice revealed by hyperspectral mapping
  title_type: original
  lang: en

## Description

- description: 'Low-temperature photoluminescence from MoSe2/WSe2 moiré superlattice
    often consists of a broad interlayer emission background with dense, narrow peaks,
    making microscopic line-by-line assignment difficult. Here, we use hyperspectral
    photoluminescence mapping and peak-decomposition-free spectral analyses to determine
    how this spectral complexity is organized in space. A 20 × 20 map acquired with
    a 400 nm pitch reveals three dominant spectral families that form contiguous real-space
    domains. Feature-wise spatial correlation analysis and whole-spectrum similarity
    yield a characteristic micron-scale length of 1.27–2.05 mm, all exceeding the
    0.85 mm optical spot size. At the same time, individual pixels retain a dense,
    multi-peak structure, implying an unresolved local spectral manifold below optical
    resolution. Correlations among centroid, dominant energy, asymmetry, width, entropy,
    sharp fraction, and roughness indicate that the micron-scale energy landscape
    and local manifold complexity can be statistically separated, while remaining
    correlated across the map, consistent with a hierarchical organization of the
    emission spectrum. These results establish hierarchical inhomogeneity as an organizing
    principle of MoSe2/WSe2 moiré superlattice photoluminescence. '
  description_type: abstract
  lang: und

## Creator

- name: Nurul Fariha Ahmad
  role: author
  orcid: https://orcid.org/0009-0008-7898-531X
- name: Yuto Urano
  role: author
  orcid: https://orcid.org/0009-0004-3646-2781
  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: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Daichi Kozawa
  role: author
  orcid: https://orcid.org/0000-0002-0629-5589
  organization: National Institute for Materials Science
- name: Ryo Kitaura
  role: author
  orcid: https://orcid.org/0000-0001-8108-109X
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: AIP Publishing
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Hyperspectral mapping
  schema: not_defined
- subject: Moire superlattices
  schema: not_defined

## Rights

- description: 'This article may be downloaded for personal use only. Any other use
    requires prior permission of the author and AIP Publishing. This article appeared
    in Nurul Fariha Ahmad, Yuto Urano, Kenji Watanabe, Takashi Taniguchi, Daichi Kozawa,
    Ryo Kitaura; Hierarchical spectral inhomogeneity in photoluminescence of a twisted
    MoSe2/WSe2 heterobilayer moiré superlattice revealed by hyperspectral mapping.
    Appl. Phys. Lett. 8 June 2026; 128 (23): 231901 and may be found at https://doi.org/10.1063/5.0335306.'
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: APPLIED PHYSICS LETTERS
  issn: '00036951'
  volume: '128'
  issue: '23'
  article_number: '231901'

## Conference



## Related item



## Funding

- identifier: JP25K22210
  funder_name: Japan Society for the Promotion of Science London
- identifier: JP24H02218
  funder_name: Japan Society for the Promotion of Science London
- identifier: JP23H05469
  funder_name: Japan Society for the Promotion of Science London
- identifier: JP24H01210
  funder_name: Japan Society for the Promotion of Science London

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## Chemical composition



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## Fileset

- id: 967bf750-5b1a-469a-b3f2-ac9bed3e12c3
  filename: manuscript_hyperspectral.pdf
  content_type: application/pdf
  size: 1851634
  md5: c20a91bc75a94515603b3d410d3e44a4

## Thumbnail

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filename: manuscript_hyperspectral.pdf