Polaron transport in the paramagnetic phase of electron-doped manganites

J. L. Cohn, C. Chiorescu, J. J. Neumeier

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

The electrical resistivity, Hall coefficient, and thermopower as functions of temperature are reported for lightly electron-doped Ca1-x Lax Mn O3 (0≤x≤0.10). Unlike the case of hole-doped ferromagnetic manganites, the magnitude and temperature dependence of the Hall mobility (μH) for these compounds is found to be inconsistent with small-polaron theory. The transport data are better described by the Feynman polaron theory and imply intermediate coupling (α 5.4) with a band effective mass m* ∼4.3 m0 and a polaron mass mp ∼10 m0.

Original languageEnglish (US)
Article number024422
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number2
DOIs
StatePublished - Jul 1 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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