Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Magnetic Particles and Clusters (jointly with CPP, BP)
MA 17.8: Vortrag
Dienstag, 12. März 2013, 12:00–12:15, H22
The Anderson Impurity Model in Finite Systems: A Study of Chromium Impurities in Gold Clusters — •Konstantin Hirsch1,2, Vicente Zamudio-Bayer1,2, Andreas Langenberg1,2, Markus Niemeyer1,2, Bruno Langbehn1,2, Thonmas Möller1, Akira Terasaki3,4, Bernd von Issendorff5, and Julian Tobias Lau2 — 1Institut für Optik und Atomare Physik, Technische Universität Berlin — 2Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH — 3Cluster Research Laboratory, Toyota Technological Institute, 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan — 4Department of Chemistry, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan — 5Fakultät für Physik, Universität Freiburg
A long standing problem in condensed matter physics is the interaction of a single magnetic impurity with a free electron gas resulting in interesting phenomena like the Kondo effect. In recent years substantial progress was obtained by studying atomic scale systems. Here we want to follow this approach and investigate the interaction of a single magnetic impurity with a finite free electron gas. CrAun+ clusters serve as a model system. We can show that the size dependence of the local spin magnetic moment of CrAun+ can well be described within in the Anderson impurity model, whereas the interaction of the localized impurity states with the electron bath of the gold matrix is governed by quantum confinement in the host, which is abscent in the corresponding bulk material.