Aufsatz in einer Fachzeitschrift
Theory for the optical-properties of small HGN clusters



Details zur Publikation
Autor(inn)en:
Baladron, C.; Garcia, M.; Stampfli, P.; Bennemann, K.
Verlag:
SPRINGER VERLAG
Publikationsjahr:
1991
Zeitschrift:
Zeitschrift für Physik D Atoms, Molecules and Clusters,Zeitschrift für Physik D Atoms, Molecules and Clusters
Seitenbereich:
215-217
Abkürzung der Fachzeitschrift:
Z. Phys. D
Jahrgang/Band:
19
Erste Seite:
215
Letzte Seite:
217
Seitenumfang:
3
ISSN:
0178-7683
eISSN:
1431-5866

Zusammenfassung, 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.


Autor(inn)en / Herausgeber(innen)

Zuletzt aktualisiert 2019-10-03 um 16:17