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Open Access Coulomb blockade behavior in nanostructured graphene with direct contacts

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Abstract:

This paper proposes a new graphene-based quantum-dot device structure, in which nanostructured graphene islands are perfectly isolated and metallic contacts are directly deposited onto them without constrictions. Such a configuration is expected to be free from disturbances resulting from the structural fluctuation of constrictions, and allows for direct contact with a nanostructured two-dimensional electron gas. Transport spectroscopy analysis of this device structure was performed, and its Coulomb blockade behavior at low temperatures was revealed. Irregular Coulomb diamonds are observed in these devices, which is an indication of the formation of a multiple-quantum-dot system.

Keywords: COULOMB BLOCKADE EFFECT; GRAPHENE; LOW-TEMPERATURE ELECTRON TRANSPORT; NANOSTRUCTURES; QUANTUM DOTS

Document Type: Short Communication

DOI: http://dx.doi.org/10.1166/mex.2013.1105

Publication date: March 1, 2013

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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