1. Graphene on Ru(0001): Contact Formation and Chemical Reactivity on the Atomic Scale
- Author
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S. J. Altenburg, Jörg Kröger, Richard Berndt, Bin Wang, Nicolás Lorente, Marie-Laure Bocquet, Ministerio de Ciencia e Innovación (España), European Commission, German Research Foundation, and Fonds Schleswig-Holstein
- Subjects
Materials science ,Condensed matter physics ,Graphene ,Scanning tunneling spectroscopy ,General Physics and Astronomy ,Conductance ,Atomic units ,Electrochemical scanning tunneling microscope ,law.invention ,law ,Chemical physics ,Lattice (order) ,Physics::Atomic and Molecular Clusters ,Scanning tunneling microscope ,Contact formation - Abstract
4 páginas, 4 figuras.-- PACS numbers: 68.65.Pq, 68.37.Ef, 72.80.Vp.-- et al., Graphene on Ru(0001) is contacted with Au tips of a cryogenic scanning tunneling microscope. The formation and conductance of single-atom contacts vary within the moiré unit cell. Density functional calculations reveal that elastic distortions of the graphene lattice occur at contact due to a selectively enhanced chemical reactivity of C atoms at hollow sites of Ru(0001). Concomitant quantum transport calculations indicate that the graphene-Ru distance determines the conductance variations., We acknowledge financial support from the Spanish MICINN (No. FIS2009-12721-C04-01). B. Wang’s work is supported by the European Commission through the Early Stage Researcher Training Network MONET, MEST-CT-2005-020908. Funding by the Deutsche Forschungsgemeinschaft (SFB 677) and Schleswig-Holstein-Fonds is acknowledged.
- Published
- 2010
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