Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3309671
Keywords
density functional theory; epitaxial layers; graphene; interface states; nickel; platinum; ruthenium; scanning tunnelling microscopy; semiconductor-metal boundaries; substrates; thermoelectricity
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Funding
- National Science Foundation of China [10834011, 60620120443, 60621061]
- National 973 projects of China [2006CB921305, 2009CB929103]
- DOE-BES of United States of American
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We report on tuning interfacial properties of epitaxially-grown graphenes with different kinds of metal substrates based on scanning tunneling microscopy experiments and density functional theory calculations. Three kinds of metal substrates, Ni(111), Pt(111), and Ru(0001), show different interactions with the epitaxially grown graphene at the interfaces. The different interfacial interaction making graphene n-type and p-type doped, leads to the polarity change of the thermoelectric property of the graphene/metal systems. These findings may give further insights to the interfacial interactions in the graphene/metal systems and promote the use of graphene-based heterostructures in devices.
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