Ferromagnetic instability in a mean-field slave-boson approach for the Anderson lattice

Journal Article · Sat May 15 04:00:00 EDT 1993 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.354045· OSTI ID:6648310

Dorin, V; Schlottmann, P ^[1]

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1. Department of Physics and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306 (United States)

We consider a stoichiometric metallic Anderson lattice with orbital degeneracy in the [ital U][r arrow][infinity] limit. A Gutzwiller type of mean-field approximation is formulated in terms of three slave bosons per site in analogy to Kotliar and Ruckenstein's approach for the Hubbard model. In the orbitally nondegenerate case the paramagnetic solution becomes unstable towards ferromagnetism if the valence is smaller than a critical one. This instability is suppressed with increasing orbital degeneracy.

• DOE Contract Number: FG05-91ER45443
• OSTI ID: 6648310
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 73:10; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

665000* -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSONS
CRYSTAL MODELS
FERROMAGNETISM
FUNCTIONS
GREEN FUNCTION
HYBRIDIZATION
INSTABILITY
MAGNETISM
MATHEMATICAL MODELS
MEAN-FIELD THEORY
STOICHIOMETRY
VALENCE