# Charge sensing of few-electron ZnO double quantum dots probed by radio-frequency reflectometry

https://mdr.nims.go.jp/datasets/915723b0-490a-42ab-83b2-987e03e12ba6

## File

- [manuscript.pdf](https://mdr.nims.go.jp/filesets/8566988d-b754-4a9d-ac0c-ca8f7c6202da/download) ([Detail](https://mdr.nims.go.jp/filesets/8566988d-b754-4a9d-ac0c-ca8f7c6202da.md))

## Id

915723b0-490a-42ab-83b2-987e03e12ba6

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-22T00:30:12.341220Z

## Updated at

2026-07-23T06:36:32.346816Z

## Published at

2026-07-23T09:30:07.492262Z

## Doi

https://doi.org/10.48505/nims.6421

## First published url

https://doi.org/10.1103/mnt5-s859

## Date published

2026-07-21

## Recorded date published

2026-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Charge sensing of few-electron ZnO double quantum dots probed by radio-frequency
    reflectometry
  title_type: original
  lang: en

## Description

- description: Zinc oxide (ZnO) has garnered much attention as a promising material
    for quantum devices due to its unique characteristics. To utilize the potential
    of ZnO for quantum devices, the development of fundamental technological elements
    such as high-speed readout and charge sensing capabilities has become essential.
    In this study, we address these challenges by demonstrating radio-frequency (rf)
    reflectometry and charge sensing in ZnO quantum dots, thus advancing the potential
    for qubit applications. A device is fabricated on a high-quality ZnO heterostructure,
    featuring gate-defined target and sensor quantum dots. The sensor dot, integrated
    into an rf resonator circuit, enables the detection of single-electron charges
    in the target dots. Using this setup, we observe the rf-detected charge stability
    diagram indicating the formation of few-electron double quantum dots and provide
    the first benchmark of the bandwidth, sensitivity, and readout fidelity of rf
    reflectometry.
  description_type: abstract
  lang: und

## Creator

- name: Kosuke Noro
  role: author
- name: Motoya Shinozaki
  role: author
  orcid: https://orcid.org/0000-0001-9460-9156
- name: Yusuke Kozuka
  role: author
  orcid: https://orcid.org/0000-0001-7674-600X
- name: Koichi Baba
  role: author
- name: Kazuma Matsumura
  role: author
- name: Yoshihiro Fujiwara
  role: author
- name: Takeshi Kumasaka
  role: author
- name: Atsushi Tsukazaki
  role: author
  orcid: https://orcid.org/0000-0003-0251-063X
- name: Masashi Kawasaki
  role: author
- name: Tomohiro Otsuka
  role: author
  orcid: https://orcid.org/0000-0003-2532-643X

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: ZnO
  schema: not_defined
- subject: Quantum dot
  schema: not_defined
- subject: rf reflectometry
  schema: not_defined

## Rights

- description: "©2026 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Physical Review Applied
  issn: '23317019'
  volume: '26'
  issue: '1'
  article_number: '014065'

## Conference



## Related item



## Funding

- funder_name: The Ebara Hatakeyama Memorial Foundation Research Grant
- funder_name: FRiD Tohoku University
- identifier: JPMXP1224NM5072
  funder_name: "“Advanced Research Infrastructure for Materials and Nanotechnology
    in Japan (ARIM)” of the Ministry of Education, Culture, Sports, Science and Technology"
- funder_name: World Premier International Research Center Initiative (WPI), MEXT,
    Japan
- funder_name: RIEC Fundamental Technology Center
- funder_name: Laboratory for Nanoelectronics and Spintronics
- identifier: 21K18592
  funder_name: MEXT Leading Initiative for Excellent Young Researchers, Grants-in-Aid
    for Scientific Research
- identifier: 22H04958
  funder_name: MEXT Leading Initiative for Excellent Young Researchers, Grants-in-Aid
    for Scientific Research
- identifier: 23H01789
  funder_name: MEXT Leading Initiative for Excellent Young Researchers, Grants-in-Aid
    for Scientific Research
- identifier: 23H04490
  funder_name: MEXT Leading Initiative for Excellent Young Researchers, Grants-in-Aid
    for Scientific Research
- identifier: 25H01504
  funder_name: MEXT Leading Initiative for Excellent Young Researchers, Grants-in-Aid
    for Scientific Research
- funder_name: Tanigawa Foundation Research Grant, Maekawa Foundation Research Grant
- funder_name: The Foundation for Technology Promotion of Electronic Circuit Board
- funder_name: Iketani Science and Technology Foundation Research Grant

## 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



## Software



## Custom property



## Fileset

- id: 8566988d-b754-4a9d-ac0c-ca8f7c6202da
  filename: manuscript.pdf
  content_type: application/pdf
  size: 689370
  md5: 131c329b69757012bc9cf9363a23fbb9

## Thumbnail

fileset_id: 8566988d-b754-4a9d-ac0c-ca8f7c6202da
filename: manuscript.pdf