Thermopower of single-crystal

Vincent H. Crespi, Li Lu Y.X. Jia, K. Khazeni, A. Zettl, Marvin L. Cohen

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

We report measurements of the thermopower of the single-crystal manganite perovskite (Formula presented) from 4.2 to 350 K at zero and finite magnetic field. The sign and magnitude of the thermopower above the magnetic transition are doping dependent. The magnitude of the thermopower drops sharply below the transition to the magnetically ordered state. At lower temperatures the thermopower changes sign from negative to positive with decreasing temperature in the range 100-150 K. Implications for the temperature-dependent electronic structure and scattering processes in this temperature range are discussed. The high-temperature behavior is interpreted within a lattice polaron model. Further analysis suggests a form of variable-range hopping conduction at high temperatures.

Original languageEnglish (US)
Pages (from-to)14303-14308
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number21
DOIs
StatePublished - 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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