Lattice Vibrations at the Metal-Semiconductor Transition in BaPb1-xBixO3
- 1 January 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (S3-2)
- https://doi.org/10.7567/jjaps.26s3.1123
Abstract
Comprehensive Raman studies of lattice vibrations in oxide superconductors BaPb1-xBixO3 are presented. In order to explain consistently the Raman and infrared data a dimerization model is proposed for the appearance of the semiconducting state in this system. The transfer-integral, on-site Coulomb repulsion and electron-molecular-vibration coupling constant are presented as a function of Bi concentration. The calculated activation energy is in good agreement with the experimental data.Keywords
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