Charge detection in a bilayer graphene quantum dot

We show measurements on a bilayer graphene quantum dot (QD) with an integrated charge detector. The focus lies on enabling charge detection with a 30 nm wide bilayer graphene nanoribbon located approximately 35 nm next to a bilayer graphene QD with an island diameter of about 100 nm. Local resonance...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2011-11, Vol.248 (11), p.2684-2687
Main Authors: Fringes, Stefan, Volk, Christian, Norda, Caroline, Terrés, Bernat, Dauber, Jan, Engels, Stephan, Trellenkamp, Stefan, Stampfer, Christoph
Format: Article
Language:English
Subjects:
Charge
Color
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in multilayers, nanoscale materials and structures
Exact sciences and technology
Graphene
Nanocomposites
nanoelectronics
Nanomaterials
Nanostructure
nanostructures
Nanotubes
Physics
Quantum dots
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Summary:We show measurements on a bilayer graphene quantum dot (QD) with an integrated charge detector. The focus lies on enabling charge detection with a 30 nm wide bilayer graphene nanoribbon located approximately 35 nm next to a bilayer graphene QD with an island diameter of about 100 nm. Local resonances in the nanoribbon can be successfully used to detect individual charging events in the dot even in regimes where the QD Coulomb peaks cannot be measured by conventional techniques. False color atomic force microscope image of the investigated device.
ISSN:0370-1972
1521-3951
1521-3951
DOI:10.1002/pssb.201100189