Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 9: Atomic clusters I (with A)
MO 9.3: Vortrag
Montag, 18. März 2013, 17:15–17:30, B 302
Magnetic Moments of Chromium-Doped Gold Clusters: Anderson Impurity Model in Finite Systems — Konstantin Hirsch1,2, Vicente Zamudio-Bayer1,2, Andreas Langenberg1,2, Markus Niemeyer1,2, Bruno Langbehn1,2, Thomas Möller1, Akira Terasaki3,4, Bernd von Issendorff5, and •Tobias Lau2 — 1Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin — 2Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin — 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, 79104 Freiburg
The interaction of a single magnetic impurity with a free electron gas is a long standing problem in condensed matter physics. It results in interesting phenomena like the Kondo effect or Friedel oscillations. In recent years substantial progress was made by studying these phenomena in atomic scale systems. Here we 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 show that the size dependence of the local spin magnetic moment of CrAun+ can well be described within in the Anderson impurity model, where 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.