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The correlated Kondo‐lattice model
Author(s) -
Kienert J.,
Santos C.,
Nolting W.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301717
Subject(s) - condensed matter physics , ferromagnetism , quasiparticle , conduction band , curie temperature , hubbard model , lattice (music) , kondo insulator , physics , magnetic moment , kondo effect , heisenberg model , lattice model (finance) , quantum mechanics , electron , nuclear magnetic resonance , superconductivity , acoustics , polymer
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 T C are calculated. The band interaction leads to an upper Hubbard peak and modifies the magnetic stability of the FKLM.