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MA: Fachverband Magnetismus
MA 2: Magnetic Clusters
MA 2.3: Talk
Monday, March 31, 2014, 10:00–10:15, HSZ 401
The Anderson Impurity Model in Finite Systems: A Study of CrAun+ Clusters — •Konstantin Hirsch1, Vicente Zamudio-Bayer1, Andreas Langenberg1, Markus Niemeyer1, Bruno Langbehn2, Thomas Möller2, Akira Terasaki3, Bernd von Issendorff4, and Julian Tobias Lau1 — 1Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany — 2Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany — 3Cluster Research Laboratory, Toyota Technological Institute, 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan — 4Fakultät für Physik, Universität Freiburg, Stefan-Meier-Straße 21, 79104 Freiburg, Germany
The Anderson impurity model (AIM) describes the interaction of a magnetic impurity with the continuous density of states of a nonmagnetic host. It gives a criterium for the magnetic to nonmagnetic transition depending on two parameters: the onsite Coulomb repulsion U0 and the hybridization strength Γ. Here we discuss the validity of the AIM in a finite host material featuring a highly discretized density of states by applying XMCD spectroscopy to size-selected CrAun+ clusters and studying the AIM within a tight binding approach.