Evidence for the immobile bipolaron formation in the paramagnetic state of the magnetoresistive manganites

Guo Meng Zhao, Guo meng Zhao, Y. S. Wang, D. J. Kang, W. Prellier, M. Rajeswari, H. Keller, T. Venkatesan, C. W. Chu, R. L. Greene

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Recent research suggests that the charge carriers in the paramagnetic state of the magnetoresistive manganites are small polarons. Here we report studies of the oxygen-isotope effects on the intrinsic resistivity and thermoelectric power in several ferromagnetic manganites. The precise measurements of these isotope effects allow us to make a quantitative data analysis. Our results do not support a simple small-polaron model, but rather provide compelling evidence for the presence of small immobile bipolarons, i.e., pairs of small polarons.

Original languageEnglish
Article numberR11949
Pages (from-to)R11949-R11952
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number18
DOIs
Publication statusPublished - 2000 Nov 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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