DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)

O 27.80: Poster

Dienstag, 24. März 2009, 18:30–21:00, P2

Controlling the Kondo Effect in CoCun Clusters Atom by AtomNicolas Néel1, •Jörg Kröger1, Richard Berndt1, Tim Wehling2, Alexander Lichtenstein2, and Mikhail Katsnelson31Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — 2Universität Hamburg, D-20355 Hamburg, Germany — 3Radboud University Nijmegen, NL-6525 AJ Nijmegen, The Netherlands

Clusters containing a single magnetic impurity were investigated by scanning tunneling microscopy, spectroscopy, and ab initio electronic structure calculations. The Kondo temperature of a Co atom embedded in Cu clusters on Cu(111) exhibits a non-monotonic variation with the cluster size. Calculations model the experimental observations and demonstrate the importance of the local and anisotropic electronic structure for correlation effects in small clusters. Financial support by the DFG through SFB 668 is acknowledged.

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