Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-09-23
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, REVTex
Scientific paper
10.1103/PhysRevB.59.529
The transport properties of the ferromagnetic Kondo lattice model in one dimension are studied via bosonization methods. The antiferromagnetic fluctuations, which normally appear because of the RKKY interactions, are explicitly taken into account as a direct exchange between the ``core'' spins. It is shown that in the paramagnetic regime with the local antiferromagnetic fluctuations, the resistivity decays exponentially as the temperature increases while in the ferromagnetic regime the system is an almost perfect conductor. %A non-perturbative description of localized spin polarons %in the paramagnetic region is obtained. The effect of a weak applied field is discussed to be reduced to the case of the ferromagnetic state leading to band splitting. The qualitative relevance of the results for the problem of the Oxide Manganites is emphasized.
Betouras Joseph J.
Fujimoto Shouji
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