Density-Functional Description of Metal Clusters
Structure and Dynamics
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Beschreibung
Clusters occupy the region between atoms and bulk and hence are valuable
tools for the understanding of macroscopic properties. A main topic of
this work is the time evolution of small and of medium size positively
charged sodium clusters. In the sense of a pump- and probe experiment,
clusters are exposed to a laser field. After the first pulse, called
the pump pulse, another time-shifted probe pulse is sent to the cluster.
It is found that the time-evolution of the rms-radius or the quadrupole
deformation are accessible with the electronic dipol signal and the amount
of emitted electrons.
Furthermore spinpolarized clusters are investigated. Moreover we see hints
that the bonding type is more covalent than metallic. This has
similarities to the trends in (spinsaturated) magnesium clusters
where small samples are rather covalent.
Autor*in
Karsten Andrae