# Enhancing spin diffusion in GaAs quantum wells: The role of electron density and channel width

https://mdr.nims.go.jp/datasets/dac91e04-1834-46a1-bc34-c9d0b81d50e9

## File

- [183902_1_5.0257898.pdf](https://mdr.nims.go.jp/filesets/67082922-6fcc-4451-9a50-239169346f2c/download) ([Detail](https://mdr.nims.go.jp/filesets/67082922-6fcc-4451-9a50-239169346f2c.md))

## Id

dac91e04-1834-46a1-bc34-c9d0b81d50e9

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-05-12T05:49:59.746262Z

## Updated at

2025-05-12T07:30:12.056148Z

## Published at

2025-05-12T07:18:55.201930Z

## Doi



## First published url

https://doi.org/10.1063/5.0257898

## Date published

2025-05-14

## Recorded date published

2025-5-14

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Enhancing spin diffusion in GaAs quantum wells: The role of electron density
    and channel width'
  title_type: original
  lang: en

## Description

- description: This study explores the relationship between spin diffusion, spin lifetime,
    electron density and lateral spatial confinement in two-dimensional electron gases
    hosted in GaAs quantum wells. Using time-resolved magneto-optical Kerr effect
    microscopy, we analyze how Hall-bar channel width and back-gate voltage modulation
    influence spin dynamics. The results reveal that the spin diffusion coefficient
    increases with reduced channel widths, a trend further amplified at lower electron
    concentrations achieved via back-gate voltages, where it increases up to 150%
    for the narrowest channels. The developed theoretical model confirms the spatial
    inhomogeneities in the spin diffusion as arising from electron-density variations
    within the channels. The results underscore the importance of tuning electron
    density and spatial geometry to optimize spin transport and coherence, providing
    valuable design considerations for spintronic devices where efficient spin manipulation
    is crucial.
  description_type: abstract
  lang: und

## Creator

- name: B. W. Grobecker
  role: author
  orcid: https://orcid.org/0009-0007-0344-0764
- name: A. V. Poshakinskiy
  role: author
  orcid: https://orcid.org/0000-0003-4514-1061
- name: S. Anghel
  role: author
  orcid: https://orcid.org/0000-0003-4517-4314
- name: T. Mano
  role: author
  orcid: https://orcid.org/0000-0002-6955-260X
- name: G. Yusa
  role: author
  orcid: https://orcid.org/0000-0003-3053-7629
- name: M. Betz
  role: author
  orcid: https://orcid.org/0000-0002-5676-3432

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: GaAs
  schema: not_defined
- subject: Quantum well
  schema: not_defined
- subject: Spin
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of Applied Physics
  issn: '00218979'
  volume: '137'
  issue: '18'

## Conference



## Related item



## Funding

- identifier: 19H05603
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: 21H05182
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: 21H05188
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: CEX2019-000910-S [MCIN/AEI/10.13039/501100011033]
  funder_name: Government of Spain under Severo Ochoa
- identifier: 2023 BP 00136)
  funder_name: Postdoctoral fellowship Beatriu de Pinos
- identifier: 24H00399
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 67082922-6fcc-4451-9a50-239169346f2c
  filename: 183902_1_5.0257898.pdf
  content_type: application/pdf
  size: 1884016
  md5: d7c02cb12afc376ba266ccae4f8dd419

## Thumbnail

fileset_id: 67082922-6fcc-4451-9a50-239169346f2c
filename: 183902_1_5.0257898.pdf