Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-03-26
Physics of Metals and Metallography, 2010, Vol. 110, No. 7, pp. 602-641
Physics
Condensed Matter
Strongly Correlated Electrons
In Russian (the English version can be accessed from the DOI link below or requested from the author); 72 pages
Scientific paper
10.1134/S0031918X10130028
A comparison is given of the fundamental works of S. V. Vonsovsky on the many-electron polar and s-d(f) exchange models with the subsequent development of the theory of magnetism of transition and rare earth metals and their compounds. Special attention is given to the derivation of different many-electron models (by Heisenberg, Hubbard, Anderson) and to the interrelation between them. Among the problems considered in this review, of most importance are the many-electron approaches used in the description of systems of d and f electrons, the atomic representation of X-operators, and the problem of strong itinerant magnetism and formation of local moments. The application of these concepts to highly correlated systems, in particular, to the half-metallic ferromagnets and the Kondo lattices is discussed.
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