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Author Chang, Jin Hyun ♦ Dawson, Francis ♦ Huzayyin, Ahmed ♦ Power, Electrical ♦ Lian, Keryn
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ASYMMETRY ♦ CAPACITANCE ♦ ELECTRIC CONTACTS ♦ GRAPHENE ♦ IMPURITIES ♦ INTERACTIONS ♦ METALS
Abstract We report a versatile computation method to quantitatively determine the quantum capacitance of graphene when it is in contact with metal. Our results bridge the longstanding gap between the theoretically predicted and experimentally measured quantum capacitance of graphene. Contrary to popular assumptions, the presence of charged impurities or structural distortions of graphene are not the only sources of the asymmetric capacitance with respect to the polarity of the bias potential and the higher-than-expected capacitance at the Dirac point. They also originate from the field-induced electronic interactions between graphene and metal. We also provide an improved model representation of a metal–graphene junction.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-09
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 19


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