Statistical Models of the Polaronic Phase Transition in Manganites

1998/08/22 by Igor Lyuksyutov, Igor F. Lyuksyutov, Lyuksyutov, Igor F. +3
Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Condensed matter physics #Delocalized electron #Electrical resistivity and conductivity #Electron #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Materials science #Metal–insulator transition #Paramagnetism #Phase (matter) #Phase transition #Physics #Polaron #Quantum mechanics #Statistical Mechanics and Entropy #Statistical physics #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.cond-mat/9808248

RevTeX 4 pages with 2 figures

arxiv created 1998/08/22 · openalex publication_date 1998/08/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose two statistical models for description the metal-insulator phase transition coupled with paramagnetic-ferromagnetic phase transition in manganites of the type La_1-xSr_xMnO₃. 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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