1999/06/17 by Unjong Yu, Yu, Unjong, B. I. Min +1
Engineering · Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Gas Sensing Nanomaterials and Sensors #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9906263
5 pages, 3 figures (ps)
arxiv created 1999/06/17 · openalex publication_date 1999/06/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Based on the combined model of the double exchange and the polaron, we have studied the small-to-large polaron crossover transition and explored its effects on the magnetic and transport properties in colossal magnetoresistance (CMR) manganites. We have used the variational Lang-Firsov canonical transformation, and shown that the magnetic and transport properties of both high and low TC manganites are well described in terms of a single formalism. We have reproduced the rapid resistivity drop below TC, a realistic CMR ratio, and the \it first-order-like sharp magnetic phase transition, which are observed in low TC manganites.