Utilization of a hubbard U model to understand the valence band photoelectron data for the high-temperature superconductors
Abstract
The valence band photoelectron spectra are interpreted within a Hubbard model. The 9.5 eV mystery peak in the photoelectron spectra for YBa2Cu3O7 is identified as arising from a state with two holes localized on nearest neighbor oxygen atoms. Hubbard U parameters are obtained from the data and found to be larger than expected for metallic systems.
- Publication:
-
Interim Technical Report George Washington Univ
- Pub Date:
- December 1988
- Bibcode:
- 1988gwu..reptR....R
- Keywords:
-
- Energy Bands;
- High Temperature Superconductors;
- Photoelectron Spectroscopy;
- Valence;
- Barium Oxides;
- Copper Oxides;
- High Temperature;
- Photoelectrons;
- Superconductivity;
- Yttrium Compounds;
- Solid-State Physics