Phase coexistence and resistivity near the ferromagnetic transition of manganites

Details Phase coexistence and resistivity near the ferromagnetic transition of manganites Phase coexistence and resistivity near the ferromagnetic transition of manganites

2006-01-31

arxiv.org/abs/cond-mat/0601712v2

Physical Review Letters, 96 (11), 117003/1-4 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.96.117003

Pairing of oxygen holes into heavy bipolarons in the paramagnetic phase and their magnetic pair-breaking in the ferromagnetic phase [the so-called current-carrier density collapse (CCDC)] has accounted for the first-order ferromagnetic phase transition, colossal magnetoresistance (CMR), isotope effect, and pseudogap in doped manganites. Here we propose an explanation of the phase coexistence and describe the magnetization and resistivity of manganites near the ferromagnetic transition in the framework of CCDC. The present quantitative description of resistivity is obtained without any fitting parameters by using the experimental resistivities far away from the transition and the experimental magnetization, and essentially model independent.

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