Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 18: Poster Session I - MA 141/144 (Atomic Wires; Size-Selected Clusters; Nanostructures; Metal Substrates: Clean Surfaces+Adsorption of Organic / Bio Molecules+Solid-Liquid Interfaces+Adsorption of O and/or H; Surface or Interface Magnetism; Oxides and Insulators: Clean Surfaces)

O 18.41: Poster

Montag, 25. Februar 2008, 18:30–19:30, Poster F

Confined electronic state in small Co islands on Cu(100) — •Timofey Balashov¹, Albert F. Takacs¹, Markus Däne², Arthur Ernst², Patrick Bruno², and Wulf Wulfhekel¹ — ¹Physikalisches Institut, Universität Karlsruhe, Wolfgang-Gaede Strasse 1, 76131 Karlsruhe, Germany — ²Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

We investigated the electronic structure of 3ML Co islands on Cu(100) with scanning tunneling microscopy and spectroscopy. A standing wave pattern was observed on the islands in the energy region from -50 to 100 meV with respect to the Fermi energy. We were able to extract the dispersion curve for this state by comparing the state energy on islands of different sizes, with different wavelengths of the standing wave pattern. The observed dispersion corresponds well to a minority Co band in theoretical band structure calculations.