Phonons have been generally considered to be irrelevant to the high-temperature superconductivity in the cuprates. However, such a bias is usually based upon the assumption of conventional electron-phonon coupling, while in the cuprates the coupling can be rather unconventional because of strong electron correlation. We present the results of our recent measurements of phonon dispersion in YBa2Cu3O6+x by inelastic neutron scattering. These suggest certain phonon modes interact strongly with electrons and are closely involved in the superconductivity phenomenon with possible contribution to pairing.
Bibliographical noteFunding Information:
The authors are grateful to M. Tachiki, S. Sachdev and J.C. Phillips for useful discussions. The work was supported by the National Science Foundation through DMR96-28134 and DMR01-02565.
Copyright 2008 Elsevier B.V., All rights reserved.
- Electron-phonon coupling
- High-temperature superconductivity
- Neutron scattering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering