Transport Properties of the Kondo Lattice Model in the Limit $S=\infty$ and $D=\infty$
arXiv:cond-mat/9407052 · doi:10.1143/JPSJ.63.3214
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