Theory for the optical properties of small Hg_n clusters

Baladrón, C.; Garcia, Martin E.; Stampfli, P.; Bennemann, K. H.

dc.date.accessioned	2008-07-02T09:13:42Z
dc.date.available	2008-07-02T09:13:42Z
dc.date.issued	1991
dc.identifier.issn	0722-3277
dc.identifier.issn	0178-7683
dc.identifier.uri	urn:nbn:de:hebis:34-2008070222424
dc.identifier.uri	http://hdl.handle.net/123456789/2008070222424
dc.format.extent	559077 bytes
dc.format.mimetype	application/pdf
dc.language.iso	eng
dc.rights	Urheberrechtlich geschützt
dc.rights.uri	https://rightsstatements.org/page/InC/1.0/
dc.subject.ddc	530
dc.title	Theory for the optical properties of small Hg_n clusters	eng
dc.type	Aufsatz
dcterms.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.	eng
dcterms.accessRights	open access
dcterms.bibliographicCitation	Z. Phys. D 19, 215 - 217 (1991)
dcterms.creator	Baladrón, C.
dcterms.creator	Garcia, Martin E.
dcterms.creator	Stampfli, P.
dcterms.creator	Bennemann, K. H.
dc.description.et	Extern	ger
dc.subject.pacs	33.10.-a	eng
dc.subject.pacs	31.50.+w	eng

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