# Band gaps and phonons of quasi-bulk rocksalt ScN

https://mdr.nims.go.jp/datasets/cd92f0a9-f7dd-4e1b-bbf1-9c83ca6d60b6

## File

- [quasi_bulk_ScN_opt_props_Suppl_v3Revised.pdf](https://mdr.nims.go.jp/filesets/7cd236d1-bfed-449b-a2fc-fab32773da14/download) ([Detail](https://mdr.nims.go.jp/filesets/7cd236d1-bfed-449b-a2fc-fab32773da14.md))
- [quasi_bulk_ScN_opt_props_v3Revised.pdf](https://mdr.nims.go.jp/filesets/dc99a209-7d10-4d2e-8b37-aa60453442be/download) ([Detail](https://mdr.nims.go.jp/filesets/dc99a209-7d10-4d2e-8b37-aa60453442be.md))

## Id

cd92f0a9-f7dd-4e1b-bbf1-9c83ca6d60b6

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-07-17T23:33:44.720825Z

## Updated at

2024-07-18T03:30:21.544861Z

## Published at

2024-07-18T03:30:21.990547Z

## Doi

https://doi.org/10.48505/nims.4595

## First published url

https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.8.L071601

## Date published

2024-07-17

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Band gaps and phonons of quasi-bulk rocksalt ScN
  title_type: original
  lang: en

## Description

- description: "In this work we present an all optical characterization of a 40 µm
    thick, fully relaxed,\r\nunintentionally and only weakly n-tpye doped (n = 1.2
    × 1018 cm−3) ScN film deposited by halide\r\nvapor phase epitaxy (HVPE) on r-sapphire.
    We employ spectroscopic ellipsometry, Raman spectroscopy,\r\nand photoluminescence
    measurements to determine intrinsic material parameters. From\r\nspectroscopic
    ellipsometry we find an indirect bandgap of 1.1 eV while the fundamental direct
    absorption\r\nedge is observed at 2.16 eV. A broad luminescence feature at 2.15
    eV is observed, matching\r\nthis transition. In the IR-spectral region we observe
    a strong phonon and a weak plasmon absorption.\r\nWe precisely determine the TO
    phonon eigenfrequency (ωTO = 340.7 cm−1), the high\r\nfrequency dielectric constant
    (ε∞ = 8.4) and the static dielectric constant (εstat = 29.7). Ramanscattering\r\nusing
    various excitation energies shows effcient multi-phonon scattering up to 6LO when\r\nELaser
    > EG,opt, where the allowed 2LO scattering is the dominant scattering mechanism
    for all\r\nexcitation energies. Their characteristic parameters determined from
    Lorentzian line shape \x1Ctting\r\nyield ωLO = 681 cm−1 and an increased broadening
    and reduced asymmetry for higher LO scattering\r\norder n. Also, an estimate for
    the exciton binding energy (EbX ≈ 14meV) could be derived as well\r\nas the Born
    effective charges Z∗Sc = −Z∗N = 3.5."
  description_type: abstract
  lang: eng

## Creator

- name: Jona Grümbel
  role: author
  organization: Otto von Guericke University Magdeburg
- name: Rüdiger Goldhahn
  role: author
  organization: Otto von Guericke University Magdeburg
- name: Martin Feneberg
  role: author
  organization: Otto von Guericke University Magdeburg
- name: Yuichi Oshima
  role: author
  orcid: https://orcid.org/0000-0001-8293-4891
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Functional Materials
    Field/Ultra-wide Bandgap Semiconductors Group
  ror: https://ror.org/026v1ze26
- name: Adam Dubroka
  role: author
  organization: Masaryk University
- name: Manfred Ramsteiner
  role: author
  organization: Paul-Drude-Institut für Festkörperelektronik

## Contact agent



## Publisher

organization: American Physical Society

## Managing organization



## Keyword

- subject: ScN
  schema: not_defined
- subject: phonon
  schema: not_defined

## Rights

- description: "©2024 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review Materials
  issn: '24759953'
  volume: '8'
  issue: '7'
  start_page: 0
  end_page: 0
  article_number: L071601

## Conference



## Related item



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## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 7cd236d1-bfed-449b-a2fc-fab32773da14
  filename: quasi_bulk_ScN_opt_props_Suppl_v3Revised.pdf
  content_type: application/pdf
  size: 1269259
  md5: a7547a90abe24d1d92d0eea196a34dfe
- id: dc99a209-7d10-4d2e-8b37-aa60453442be
  filename: quasi_bulk_ScN_opt_props_v3Revised.pdf
  content_type: application/pdf
  size: 1557742
  md5: 8437cbed9a32b1f24e0aa7fcd14a58c6

## Thumbnail

fileset_id: 7cd236d1-bfed-449b-a2fc-fab32773da14
filename: quasi_bulk_ScN_opt_props_Suppl_v3Revised.pdf