Valence-band photoemission measurements have been made both above and below the Tc of Ba2YaCu3O9- where =2.1. We find similarities to recent calculations of the electronic properties. However, the experimental binding energies are between 1.0 and 1.4 eV further from the Fermi level than the calculation. We suggest that this difference may affect attempts to predict Tc from tight-binding modeling of the electron-phonon mechanism.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics