# Spin relaxation in a single-electron graphene quantum dot

https://mdr.nims.go.jp/datasets/e6efd00e-f817-46ff-96eb-fdb29873ba4a

## File

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## Id

e6efd00e-f817-46ff-96eb-fdb29873ba4a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-26T05:12:30.099488Z

## Updated at

2025-02-26T23:31:05.423894Z

## Published at

2025-02-26T23:31:05.550742Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-31231-5

## Date published

2022-06-25

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Spin relaxation in a single-electron graphene quantum dot
  title_type: original
  lang: en

## Description

- description: The relaxation time of a single-electron spin is a key parameter for
    solid-state spin qubits, as it directly limits the lifetime of the encoded information.
    Thanks to the low spin-orbit interaction and low hyperfine coupling, graphene
    and bilayer graphene (BLG) have long been considered promising platforms for spin
    qubit. Only recently, it has become possible to control single-electrons in BLG
    quantum dots (QDs) and to understand their spin-valley texture, while the relaxation
    dynamics have remained mostly unexplored. Here, we report spin relaxation times
    (T1) of single-electron states in BLG QDs. Using pulsed-gate spectroscopy, we
    extract relaxation times exceeding 200 μs at a magnetic field of 1.9 T. The T1
    values show a strong dependence on the spin splitting, promising even longer T1
    at lower magnetic fields, where our measurements are limited by the signal-to-noise
    ratio. The relaxation times are more than two orders of magnitude larger than
    those previously reported for carbon-based QDs, confirming that graphene is a
    promising host material for scalable spin qubits.
  description_type: abstract
  lang: und

## Creator

- name: L. Banszerus
  role: author
- name: K. Hecker
  role: author
- name: S. Möller
  role: author
- name: E. Icking
  role: author
- name: K. Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: T. Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: C. Volk
  role: author
- name: C. Stampfer
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Spin relaxation
  schema: not_defined
- subject: bilayer graphene
  schema: not_defined
- subject: quantum dots
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '3637'

## Conference



## Related item



## Funding

- identifier: '390534769'
  funder_name: Deutsche Forschungsgemeinschaft

## Instrument



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## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 7fb8cac3-1ad4-4f59-848b-1e433b11a7b6
  filename: s41467-022-31231-5.pdf
  content_type: application/pdf
  size: 1023957
  md5: 2540cbdbe8ec3bbfe8000824a1f06e1b

## Thumbnail

fileset_id: 7fb8cac3-1ad4-4f59-848b-1e433b11a7b6
filename: s41467-022-31231-5.pdf