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Description:

We measure telegraph noise of current fluctuations in an electrostatically defined quantum dot in bilayer graphene by real-time detection of single electron tunneling with a capacitively coupled neighboring quantum dot. Suppression of the second and third cumulant (related to shot noise) in a tunable graphene quantum dot is demonstrated experimentally. With this method we demonstrate the ability to measure very low current and noise levels. Furthermore, we use this method to investigate the first spin excited state, an essential prerequisite to measure spin relaxation.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Telegraph noise, quantum dot, bilayer graphene

Date published: 2023-01-24

Publisher: American Physical Society (APS)

Journal:

• Physical Review Research (ISSN: 26431564) vol. 5 issue. 1 013042

Funding:

• Graphene Flagship
• Horizon 2020 862660/QUANTUM
• National Center of Competence in Research Quantum Science and Technology 51NF40-185902
• HORIZON EUROPE Marie Sklodowska-Curie Actions 766025
• Ministry of Education, Culture, Sports, Science and Technology JPMXP0112101001
• Japan Society for the Promotion of Science JP20H00354
• Core Research for Evolutional Science and Technology JPMJCR15F3

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevresearch.5.013042

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Updated at: 2025-02-23 22:47:05 +0900

Published on MDR: 2025-02-23 22:47:05 +0900