Abstract
We study the interaction of electrons with phonons in strongly correlated solids, having high- cuprates in mind. Using sum rules, we show that the apparent strength of this interaction strongly depends on the property studied. If the solid has a small fraction (doping) of charge carriers, the influence of the interaction on the phonon self-energy is reduced by a factor , while there is no corresponding reduction of the coupling seen in the electron self-energy. This supports the interpretation of recent photoemission experiments, assuming a strong coupling to phonons.
- Received 2 July 2004
DOI:https://doi.org/10.1103/PhysRevLett.93.237001
©2004 American Physical Society