Abstract
We analyze the single-particle part of the periodic Anderson model starting from the atomic representation for band (5 d) and localized (4 f) orbitals. This system with an interatomic hybridization, is transformed into a two-band structure with an intraatomic mixing between the component bands. The resultant hybridized-band structure has narrow lower band with a singular density of states (DOS) at its upper edge. The importance of this singularity for orbitally degenerate 4 f or 5 f systems is briefly discussed.
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