The correlated Kondo-lattice model

We investigate the ferromagnetic Kondo‐lattice model (FKLM) with a correlated conduction band. A moment conserving approach is proposed to determine the electronic self‐energy. Mapping the interaction onto an effective Heisenberg model we calculate the ordering of the localized spin system self‐cons...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2003-03, Vol.236 (2), p.515-518
Main Authors: Kienert, J., Santos, C., Nolting, W.
Format: Article
Language:English
Subjects:
71.27.+a
75.30.Mb
75.30.Vn
Colossal magnetoresistance
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Lattice fermion models (Hubbard model, etc.)
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Physics
Strongly correlated electron systems
heavy fermions
Strongly correlated systems
heavy fermions
Theories and models of many electron systems
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Summary:We investigate the ferromagnetic Kondo‐lattice model (FKLM) with a correlated conduction band. A moment conserving approach is proposed to determine the electronic self‐energy. Mapping the interaction onto an effective Heisenberg model we calculate the ordering of the localized spin system self‐consistently. Quasiparticle densities of states (QDOS) and the Curie temperature TC are calculated. The band interaction leads to an upper Hubbard peak and modifies the magnetic stability of the FKLM.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200301717