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A: Atomphysik

A 7: Cluster

A 7.4: Talk

Tuesday, March 23, 2004, 11:45–12:00, HS 132

Structure and dynamics of impurity doped metal clusters — •Jamal Berakdar — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany

The electronic properties of large metal spherical clusters are investigated using a finite temperature Green’s function approach. On the basis of first-order perturbation theory the impact of many-body effects is discussed. In particular, for impurity doped clusters oscillations in the electronic charge density ( Friedel oscillations) occur which have a distinctively different behaviour than those found in extended systems (e.g. in metal surfaces). Finite size effects are discussed and their influence on fluctuation-mediated interactions is illustrated.