Optical investigations of
- 1 February 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 59 (5) , 3793-3797
- https://doi.org/10.1103/physrevb.59.3793
Abstract
We investigated temperature-dependent optical conductivity spectra of Its phonon bending mode starts to be splitted near a structural phase-transition temperature. With further cooling, the strength of a midinfrared small polaron peak, which is located at 0.4 eV, becomes increased. These temperature-dependent changes in the phonon spectra and the polaron absorption peaks were explained by a phase separation and a percolation-type transition.
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