Journal article
Theory for the optical-properties of small HGN clusters



Publication Details
Authors:
Baladron, C.; Garcia, M.; Stampfli, P.; Bennemann, K.
Publisher:
SPRINGER VERLAG
Publication year:
1991
Journal:
Zeitschrift für Physik D Atoms, Molecules and Clusters,Zeitschrift für Physik D Atoms, Molecules and Clusters
Pages range:
215-217
Journal acronym:
Z. Phys. D
Volume number:
19
Start page:
215
End page:
217
Number of pages:
3
ISSN:
0178-7683
eISSN:
1431-5866

Abstract
The static and dynamical polarizabilities of the Hg-dimer are calculated by using a Hubbard Hamiltonian to describe the electronic structure. The Hamiltonian is diagonalized exactly within a subspace of second-quantized electronic states from which only multiply ionized atomic configurations have been excluded. With this approximation we can describe the most important electronic transitions including the effect of charge fluctuations. We analyze the polarizability as a function of the intraatomic Coulomb interaction which represents the repulsion between electrons. We obtain that this interaction results in strong electronic correlations in the excited states and increases the first excitation energy of the dimer by 0.8 eV in comparison to a calculation which neglects correlations, resulting in a better agreement with the experiment.


Authors/Editors

Last updated on 2019-10-03 at 16:17