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Polaron transport and lattice dynamics in colossal-magnetoresistance manganites

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 55, Issue: 18, Page: 12454-12459
1997
  • 92
    Citations
  • 0
    Usage
  • 19
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    92
    • Citation Indexes
      92
  • Captures
    19

Article Description

Based on the model combining the spin double exchange and the lattice polaron, we have studied the colossal-magnetoresistance phenomena observed in perovskite manganites (Formula presented)(Formula presented)(Formula presented). First, effects of both the double exchange and the electron-phonon interaction on the transport properties are investigated. We have evaluated the temperature-dependent resistance and the magnetoresistance using the Kubo formula, and examined the crossover from the tunneling to hopping regime of small polarons. Second, effects of the double-exchange interaction on the lattice degree of freedom are explored. It is found that both the hardening of the phonon frequency and a reduction of the phonon damping take place with decreasing the temperature. © 1997 The American Physical Society.

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