Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.236101
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Funding
- Spanish MICINN [FIS2009-12721-C04-01]
- European Commission through the Early Stage Researcher Training Network MONET [MEST-CT-2005-020908]
- Deutsche Forschungsgemeinschaft [SFB 677]
- Schleswig-Holstein-Fonds
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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 moire 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.
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