Small Magnetic Polaron Picture of Colossal Magnetoresistance in Manganites

Details Small Magnetic Polaron Picture of Colossal Magnetoresistance in Manganites Small Magnetic Polaron Picture of Colossal Magnetoresistance in Manganites

1998-09-08

arxiv.org/abs/cond-mat/9809130v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, corrected format

Scientific paper

We present a small-but-sizeable magnetic polaron picture where transport at high temperatures is activated while at low temperatures it is band-like. We show that both double exchange and finite bandwidth effects are important to understand colossal magnetoresistance as well as the coincidence of the metal-insulator and the ferromagnetic transitions in manganites. The magnetic transition is explained using band-like motion of the polarons.

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