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Small Magnetic Polaron Picture of Colossal Magnetoresistance in Manganites

Sudhakar Yarlagadda
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Abstract

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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Sudhakar Yarlagadda. 1998-09-09. Small Magnetic Polaron Picture of Colossal Magnetoresistance in Manganites. https://arxiv.org/abs/cond-mat/9809130

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