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• W3083935729 startingPage "1068" @default.
• W3083935729 abstract "Quantum states in graphene are four-fold degenerate: two fold in spins, and two fold in valleys.Both degrees of freedom can be utilized for qubit preparations. In our bilayer graphene quantumdots, we demonstrate that the valley g-factorgv, defined analogously as the spin g-factorgsforvalley splitting in perpendicular magnetic field, is tunable by over a factor of 4 from 20 to 90. Wefind that largergvresults from larger electronic dot sizes, determined from the charging energy.This control is achieved by adjusting voltages on merely two gates, which also allows for tuning ofthe dot-lead tunnel coupling. On our versatile device, bipolar operation, charging our quantum dotwith charge carriers of the same or the opposite polarity as the leads, can be performed. Dots ofboth polarity are tunable to the first charge carrier by action of the plunger gate, such that thetransition from an electron to a hole dot can be observed. By adding more gates, this system caneasily be extended to host double dots." @default.
• W3083935729 created "2020-09-14" @default.
• W3083935729 creator A5005745398 @default.
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• W3083935729 date "2021-01-15" @default.
• W3083935729 modified "2023-10-09" @default.
• W3083935729 title "Tunable Valley Splitting and Bipolar Operation in Graphene Quantum Dots" @default.
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• W3083935729 doi "https://doi.org/10.1021/acs.nanolett.0c04343" @default.
• W3083935729 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33449702" @default.
• W3083935729 hasPublicationYear "2021" @default.
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