Transport Properties of the Kondo Lattice Model in the Limit $S=\infty$ and $D=\infty$

Abstract

The Kondo lattice model with Hund's ferromagnetic spin coupling is investigated as a microscopic model of the perovskite-type 3d transition-metal oxide La${}_{1-x}$Sr${}_x$MnO${}_3$. In the classical spin limit $S=\infty$ and the infinite-dimensional limit $D=\infty$, the one-body Green's function is calculated exactly. Transport properties of the system in the presence of magnetic fields are calculated. The giant magnetoresistance of this model, which is in a good agreement with the experimental data of La${}_{1-x}$Sr${}_x$MnO${}_3$, is explained by the spin disorder scattering process.

8 pages, 2 PS figures at the end, LaTeX, ISSP Tech.Rep. No. 2840

References in corpus (1)

• The Hubbard Model at Infinite Dimensions: Thermodynamic and Transport Properties

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