# Constancy of the quadrupolar interaction product in nanocrystalline gallium nitride revealed by 71Ga MAS NMR shift distribution

https://mdr.nims.go.jp/datasets/883be023-3eae-4487-a71a-f9b678beaed3

## File

- [Tansho_revised_manuscript_without_changes_marked_20180801_2.pdf](https://mdr.nims.go.jp/filesets/2e15ac81-9872-4d76-92e9-9be6ec7e3fb4/download) ([Detail](https://mdr.nims.go.jp/filesets/2e15ac81-9872-4d76-92e9-9be6ec7e3fb4.md))

## Id

883be023-3eae-4487-a71a-f9b678beaed3

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-02-27T04:07:23.570468Z

## Updated at

2024-12-24T09:26:25.644689Z

## Published at

2024-12-24T23:30:58.564041Z

## Doi

https://doi.org/10.48505/nims.4430

## First published url

https://doi.org/10.1016/j.ssnmr.2018.08.006

## Date published

2018-12-14

## Recorded date published

2019-2

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Constancy of the quadrupolar interaction product in nanocrystalline gallium
    nitride revealed by 71Ga MAS NMR shift distribution
  title_type: original
  lang: en

## Description

- description: "The question of whether the broad 71,69Ga nuclear magnetic resonance
    (NMR) signal of hexagonal gallium nitride (h-GaN) at 530–330 ppm is related to
    the Knight shift (caused by the presence of carriers in semiconductors) is the
    subject of intense debate. The intensity increase observed for the narrower 71Ga
    magic angle spinning (MAS) NMR signals above 1050 \x01C suggests that the broader
    signals do not reflect the decomposition of h-GaN. Herein, we utilized 71Ga multi-quantum
    (MQ) MAS NMR spectroscopy to reveal that the quadrupolar interaction products
    for the broad signal of nanocrystalline h-GaN are almost constant in the entire
    shift range that we investigated, equaling 1.7 \x03 0.1 MHz or similar values.
    Since the above parameter is sensitive to the local chemical symmetry around the
    Ga atom, the NMR shift distribution is considered not to be related to that of
    the chemical environment. Consistent with the most recent reports, including those
    on double-resonance 15N{71Ga} measurements, the Knight shift may be ascribed to
    defects serving as shallow donors and populating the conduction band. Thus, MQMAS
    measurements performed using a low-field NMR instrument or by choosing half-integer
    quadrupole nuclei with a large quadrupole constant such as 69Ga are expected to
    provide important information for each Knight shift value and for analyzing the
    nature of semiconductors other than GaN."
  description_type: abstract
  lang: en

## Creator

- name: Masataka Tansho
  role: author
  orcid: https://orcid.org/0000-0001-7986-3199
  organization: National Institute for Materials Science
- name: Takayuki Suehiro
  role: author
  orcid: https://orcid.org/0000-0001-9444-9738
  organization: National Institute for Materials Science
- name: Tadashi Shimizu
  role: author
  orcid: https://orcid.org/0000-0003-1202-8185
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Semiconductor
  schema: not_defined
- subject: Carrier distribution
  schema: not_defined
- subject: Knight shift
  schema: not_defined
- subject: MQMAS
  schema: not_defined
- subject: Quadrupole coupling constant
  schema: not_defined
- subject: Defect
  schema: not_defined
- subject: Korringa rule
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Solid State Nuclear Magnetic Resonance
  issn: '09262040'
  start_page: 25
  end_page: 30

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## Chemical composition



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## Fileset

- id: 2e15ac81-9872-4d76-92e9-9be6ec7e3fb4
  filename: Tansho_revised_manuscript_without_changes_marked_20180801_2.pdf
  content_type: application/pdf
  size: 982321
  md5: c6a445f5c9dc5a2592300cf9e9b594fa

## Thumbnail

fileset_id: 2e15ac81-9872-4d76-92e9-9be6ec7e3fb4
filename: Tansho_revised_manuscript_without_changes_marked_20180801_2.pdf