Statistical Models of the Polaronic Phase Transition in Manganites
Igor F. Lyuksyutov, Valery Pokrovsky
Abstract
We propose two statistical models for description the metal-insulator phase transition coupled with paramagnetic-ferromagnetic phase transition in manganites of the type La1-xSrxMnO3. The first one based on the competition of small polarons and delocalized carriers. In the second one the conductivity appears as a result of overlapping of large polarons. We compare our models with the experimental data.
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