Abstract
It is well established that transport properties of colossal magnetoresistive manganites can be qualitatively explained by the small polaron model incorporating the double-exchange interaction. We have improved this model by taking into account effects of phonon frequency hardening below (Formula presented) It is found that the effects are significant in that the resistivity drop for (Formula presented) becomes much steeper and the magnetoresistance is enhanced substantially at (Formula presented) in accord with experiments. This model is applied to understand the evolution of (Formula presented) with the chemical pressure in (Formula presented) series.
| Original language | English |
|---|---|
| Pages (from-to) | 84-87 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 61 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2000 |