Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 93: Graphen (organized by DS)
TT 93.10: Vortrag
Donnerstag, 19. März 2015, 12:00–12:15, H 0111
Electronic properties of Co atoms on Graphene / Ir(111) by photoelectron spectroscopy — •Michael Heber1, Markus Scholz1, Adrian Benz1, Deniza Chekrygina1, Michael Martins1, and Wilfried Wurth1,2 — 1Physics Department and Center for Free-Electron Laser Science, Univ. Hamburg, 22761 Hamburg, Germany — 2DESY Photon Science, 22607 Hamburg, Germany
Despite of the enormous achievements in our understanding of the interaction of deposited metal atoms with the underlying substrates, they still bear a variety of unexplored features. Recently, Graphene grown on metal substrates has proven to be a versatile template to create ordered arrays of adsorbed metal atoms. It was shown, that the electronic properties of adsorbed transition metal atoms strongly depend on the hybridization between the transition metal d-orbitals and the graphene π-band. The graphene π-band itself can hybridize with the valence states of the metal substrates. This opens a gateway to manipulate the adsorbate-Graphene interface itself and thus the electronic properties. We present core and valence level photoemission measurements of Co atoms deposited on Graphene/Ir(111) to obtain a detailed picture of the hybridization effects on the electronic structure of the metal atoms.This work is supported by the SFB 668 "Magnetism from single atoms to nanostructures"