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Dispersive sensing of charge states in a bilayer graphene quantum dot
- Source :
- Appl. Phys. Lett. 118, 093104 (2021)
- Publication Year :
- 2020
-
Abstract
- We demonstrate dispersive readout of individual charge states in a gate-defined few-electron quantum dot in bilayer graphene. We employ a radio frequency reflectometry circuit, where an LC resonator with a resonance frequency close to 280 MHz is directly coupled to an ohmic contact of the quantum dot device. The detection scheme based on changes in the quantum capacitance operates over a wide gate-voltage range and allows to probe excited states down to the single-electron regime. Crucially, the presented sensing technique avoids the use of an additional, capacitively coupled quantum device such as a quantum point contact or single electron transistor, making dispersive sensing particularly interesting for gate-defined graphene quantum dots.<br />Comment: 5 Pages, 4 Figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 118, 093104 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2012.06221
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/5.0040234