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KOBRA - Dokumentenserver der Universität Kassel  → Fachbereiche  → FB 10 / Mathematik und Naturwissenschaften  → Institut für Physik  → Theoretische Physik II - Theoretische Festkörper- und Ultrakurzzeitphysik  → Publikationen 

Please use this identifier to cite or link to this item: http://nbn-resolving.de/urn:nbn:de:hebis:34-2008070222435

Title: On the transition from localized to delocalized electronic states in divalent-metal clusters
Authors: Garcia, Martin E.Pastor, G. M.Bennemann, K. H.
???metadata.dc.subject.ddc???: 530 - Physik (Physics)
Issue Date: 1991
Citation: Z. Phys. D 19, 219 - 221 (1991)
Abstract: The transition from van der Waals to covalent bonding, which is expected to occur in divalent-metal clusters with increasing cluster size, is discussed. We propose a model which takes into account, within the same electronic theory, the three main competing contributions, namely the kinetic energy of the electrons, the Coulomb interactions between electrons, and the s \gdw p intraatomic transitions responsible for van der Waals like bonding. The model is solved by taking into account electron correlations using a generalized Gutzwiller approximation (slave boson method). The occurrence of electron localization is studied as a function of the interaction parameters and cluster size.
URI: urn:nbn:de:hebis:34-2008070222435
ISSN: 0178-76830722-3277
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