Spectroscopy of a single-carrier bilayer graphene quantum dot from time-resolved charge detection
H Duprez, S Cances, A Omahen, M Masseroni… - arXiv preprint arXiv …, 2023 - arxiv.org
arXiv preprint arXiv:2311.12949, 2023•arxiv.org
We measured the spectrum of a single-carrier bilayer graphene quantum dot as a function of
both parallel and perpendicular magnetic fields, using a time-resolved charge detection
technique that gives access to individual tunnel events. Thanks to our unprecedented
energy resolution of 4$\mu~ $ eV, we could distinguish all four levels of the dot's first orbital,
in particular in the range of magnetic fields where the first and second excited states cross ($
B_\perp\lesssim 100~ $ mT). We thereby experimentally establish, the hitherto extrapolated …
both parallel and perpendicular magnetic fields, using a time-resolved charge detection
technique that gives access to individual tunnel events. Thanks to our unprecedented
energy resolution of 4$\mu~ $ eV, we could distinguish all four levels of the dot's first orbital,
in particular in the range of magnetic fields where the first and second excited states cross ($
B_\perp\lesssim 100~ $ mT). We thereby experimentally establish, the hitherto extrapolated …
We measured the spectrum of a single-carrier bilayer graphene quantum dot as a function of both parallel and perpendicular magnetic fields, using a time-resolved charge detection technique that gives access to individual tunnel events. Thanks to our unprecedented energy resolution of 4eV, we could distinguish all four levels of the dot's first orbital, in particular in the range of magnetic fields where the first and second excited states cross (mT). We thereby experimentally establish, the hitherto extrapolated, single-charge carrier spectrum picture and provide a new upper bound for the inter-valley mixing, equal to our energy resolution.
arxiv.org
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