Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 11, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3231440
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Funding
- Polish Ministry of Science and Higher Education
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Graphene devices require electric contacts with metals, particularly with gold. Scanning tunneling spectroscopy studies of electron local density of states performed on mono-, bi-, and trigraphene layer deposited on metallic Au/Cr/SiO2/Si substrate shows that gold substrate causes the Fermi level shift downwards which means that holes are donated by metal substrate to graphene which becomes p-type doped. These experimental results are in good accordance with recently published density function theory calculations. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3231440]
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