Hadrien Duprez
;
Solenn Cances
;
Andraz Omahen
;
Michele Masseroni
;
Max J. Ruckriegel
;
Christoph Adam
;
Chuyao Tong
;
Rebekka Garreis
;
Jonas D. Gerber
;
Wister Huang
;
Lisa Gächter
;
Kenji Watanabe
(National Institute for Materials Science)
;
Takashi Taniguchi
(National Institute for Materials Science)
;
Thomas Ihn
;
Klaus Ensslin
Collection
Citation
Description:
(abstract)We measured the spectrum of a single-carrier bilayer graphene quantum dot as a function of both parallel and perpendicular magnetic field, using a time-resolved charge detection technique that gives access to individual tunnel events. Thanks to our unprecedented resolution of 4 μeV, we could distinguish all four of the dot’s energy levels, in particular in the range of magnetic field where the first and second excited states cross (B⊥ <∼ 100 mT). We thereby experimentally establish the, hitherto simply extrapolated, single-charge carrier spectrum picture and provide a new upper bound for the inter-valley mixing, equal to our energy resolution.
Rights:
Keyword: bilayer graphene quantum dot , spin-valley locking , valley qubit
Date published: 2024-11-09
Publisher: Springer Science and Business Media LLC
Journal:
- Nature Communications (ISSN: 20411723) vol. 15 issue. 1 9717
Funding:
- Swiss National Science Foundation | National Center of Competence in Research Quantum Science and Technology 51NF40-185902
- MEXT | Japan Society for the Promotion of Science 21H05233 and 23H02052
Manuscript type: Publisher's version (Version of record)
MDR DOI:
First published URL: https://doi.org/10.1038/s41467-024-54121-4
Related item:
Other identifier(s):
Contact agent:
Updated at: 2026-02-16 16:30:18 +0900
Published on MDR: 2026-02-16 13:57:31 +0900
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