抄録
Using a simple model with fd-hybridization process and electron-phonon interaction, we investigate the polaron effects on the f-level width in mixed-valent systems of rare-earth materials at finite temperatures and find that strong polaron effects must show significant temperature dependences to diminish at temperatures higher than the characteristic phonon energy and an explicit account of the conservation of electron number makes such temperature dependences more significant. We also discuss several possibilities to observe such temperature dependences in experiments.
