Dresden 2009 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

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

Tuesday, March 24, 2009, 18:30–21:00, P2

Controlling the Kondo Effect in CoCu_n Clusters Atom by Atom — Nicolas Néel¹, •Jörg Kröger¹, Richard Berndt¹, Tim Wehling², Alexander Lichtenstein², and Mikhail Katsnelson³ — ¹Christian-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.