Geodesic
Kondo interaction and strongly correlated electrons
Teoretičeskaâ i matematičeskaâ fizika, Tome 101 (1994) no. 2, pp. 304-314

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A study is made of a system of strongly correlated electrons that are localized on a lattice and coupled to the free electrons by the 4-fermion interaction proposed by Kondo. A realistic Hamiltonian is constructed in the basis of atomic operators of the superalgebra spl(8;8). A scheme is proposed for calculating the spectrum of Fermi excitations with respect to a small parameter, which is the hopping integral made dimensionless by intraatomic correlations. The static spin susceptibility is calculated as a function of the temperature and concentration of the electrons and is found to be in agreement with the experimental susceptibility for several narrow-band organometallic compounds. The nonphonon kinematic mechanism is used to estimate the possibility of superconducting pairing in the proposed model, and $T_c$ and the corresponding critical electron concentration in one of the correlated bands are calculated. 
@article{TMF_1994_101_2_a11,
     author = {P. B. Zubin and V. A. Ivanov and E. A. Ugolkova},
     title = {Kondo interaction and strongly correlated electrons},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {304--314},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1994_101_2_a11/}
}
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P. B. Zubin; V. A. Ivanov; E. A. Ugolkova. Kondo interaction and strongly correlated electrons. Teoretičeskaâ i matematičeskaâ fizika, Tome 101 (1994) no. 2, pp. 304-314. http://geodesic.mathdoc.fr/item/TMF_1994_101_2_a11/