Orbital selective coupling between Ni adatoms and graphene Dirac electrons

We investigate the coupling of Ni monomers and tri mers to graphene by means of atomically resolved scanning tunneling microscopy (STM). The precise adsorption site of the adatoms is determined experimentally. STM images reveal characteristic nodal structures above the Ni adatoms and tri mers on gra...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-04, Vol.85 (16), Article 161406
Main Authors: Gyamfi, M., Eelbo, T., Waśniowska, M., Wehling, T. O., Forti, S., Starke, U., Lichtenstein, A. I., Katsnelson, M. I., Wiesendanger, R.
Format: Article
Language:English
Subjects:
Clusters
Condensed matter
Graphene
Joining
Mathematical analysis
Monomers
Nickel
Scanning tunneling microscopy
Symmetry
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Summary:We investigate the coupling of Ni monomers and tri mers to graphene by means of atomically resolved scanning tunneling microscopy (STM). The precise adsorption site of the adatoms is determined experimentally. STM images reveal characteristic nodal structures above the Ni adatoms and tri mers on graphene. First-principles calculations combined with symmetry considerations explain our experimental results by an orbitally controlled interaction of the adatoms and clusters with the Dirac electrons in graphene.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.85.161406