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Document type:
Zeitschriftenaufsatz
Author(s):
Zwicknagl, Gertrud; Pollmann, Frank
Title:
Electron correlations in systems with orbital degeneracies: The dual nature of 5f electrons, heavy fermions and spectral functions in U-compounds
Abstract:
The present paper focuses on the dual nature of 5f electrons in U compounds and the concept of partial localization. The latter can arise due to intra-atomic correlations described by Hund's rules. To derive a microscopic picture, the electronic correlations in orbitally degenerate systems are studied by exact diagonalizations for finite clusters. Results for excitation spectra are presented. The cluster calculations form the basis for an approximate treatment of extended systems. The excitation...     »
Journal title:
Physica B: Condensed Matter 2005-04
Year:
2005
Journal volume:
359-361
Pages contribution:
639-641
Fulltext / DOI:
doi:10.1016/j.physb.2005.01.182
Publisher:
Elsevier BV
E-ISSN:
0921-4526
Date of publication:
01.04.2005
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