Counting statistics of single electron transport in bilayer graphene quantum dots

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 tunabl...

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Bibliographic Details
Published inPhysical review research Vol. 5; no. 1; p. 013042
Main Authors Garreis, Rebekka, Gerber, Jonas Daniel, Stará, Veronika, Tong, Chuyao, Gold, Carolin, Röösli, Marc, Watanabe, Kenji, Taniguchi, Takashi, Ensslin, Klaus, Ihn, Thomas, Kurzmann, Annika
Format Journal Article
LanguageEnglish
Published American Physical Society 01.01.2023
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Summary: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.
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.5.013042