# Hierarchical disorder in moiré exciton photoluminescence probed by spectral-descriptor correlations

https://mdr.nims.go.jp/datasets/067d9fb0-4670-4f3d-9399-01675112b8d6

## File

- [main.pdf](https://mdr.nims.go.jp/filesets/811bdbb8-f772-40e4-9c8a-80dcaa7eac42/download) ([Detail](https://mdr.nims.go.jp/filesets/811bdbb8-f772-40e4-9c8a-80dcaa7eac42.md))

## Id

067d9fb0-4670-4f3d-9399-01675112b8d6

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-08T02:45:23.952613Z

## Updated at

2026-08-17T23:41:10.199792Z

## Published at

2026-08-18T01:28:52.365124Z

## Doi

https://doi.org/10.48505/nims.6460

## First published url

https://doi.org/10.1103/jt25-c8fp

## Date published

2026-08-07

## Recorded date published

2026-8

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Hierarchical disorder in moiré exciton photoluminescence probed by spectral-descriptor
    correlations
  title_type: original
  lang: en

## Description

- description: "Hyperspectral photoluminescence maps of moiré transition-metal dichalcogenide
    heterobilayers encode rich information about the underlying disorder, but extracting
    it is hampered by the ambiguity of assigning individual spectral peaks. We show
    that the spatial correlations among a set of simple, peak-decomposition-free spectral
    descriptors—such as the centroid energy, the dominant-peak energy, and a sharp-line
    fraction—provide a peak-decomposition-free route to infer features of that disorder.
    Different descriptors act as filters that select different components of a multiscale
    disorder landscape—a smooth, micron-correlated background and a dense set of localized
    traps—and therefore acquire different spatial correlation lengths. The central
    prediction is a correlation-length hierarchy, \U0001D709⁡(\U0001D438cent)≥\U0001D709⁡(\U0001D438dom),
    which we derive by splitting the dominant-peak energy into a smooth background
    part and a short-range trap-switching fluctuation. The same picture explains the
    measured interdescriptor correlations, including the near-perfect anticorrelation
    \U0001D70CS⁡(Δ⁢\U0001D438cd,\U0001D445HL)≈−0.978, which we show to be a robust
    geometric trend for spectra dominated by a common emission-envelope asymmetry.
    Benchmarked against phenomenological simulations, Hamiltonian diagonalization,
    and the measured MoSe2/WSe2 descriptor correlations, the framework turns descriptor
    maps into a quantitative, peak-decomposition-free probe of slow disorder and local
    traps in moiré excitons and, more broadly, in disordered semiconductor emitters."
  description_type: abstract
  lang: und

## Creator

- name: Katsunori Wakabayashi
  role: author
  orcid: https://orcid.org/0000-0002-9147-9939

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## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Moiré excitons
  schema: not_defined
- subject: Hyperspectral photoluminescence
  schema: not_defined
- subject: Spectral descriptors
  schema: not_defined
- subject: Transition-metal dichalcogenide heterobilayers
  schema: not_defined
- subject: Exciton traps
  schema: not_defined
- subject: Correlation analysis
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

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## Journal

- title: Physical Review Research
  issn: '26431564'
  volume: '8'
  issue: '3'
  article_number: '033150'

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## Funding

- identifier: JP25K01609
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22H05473
  funder_name: Japan Society for the Promotion of Science
- identifier: JP21H01019
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJCR19T1
  funder_name: Japan Science and Technology Agency

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## Fileset

- id: 811bdbb8-f772-40e4-9c8a-80dcaa7eac42
  filename: main.pdf
  content_type: application/pdf
  size: 2087907
  md5: 1005059c48cb43ba6c3b1c260a460c6f

## Thumbnail

fileset_id: 811bdbb8-f772-40e4-9c8a-80dcaa7eac42
filename: main.pdf