Utilization of a HubbardUmodel to understand the valence-band photoelectron data for the high-temperature superconductors
- 1 December 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (16) , 11816-11819
- https://doi.org/10.1103/physrevb.38.11816
Abstract
The valence-band photoelectron spectra are interpreted within a Hubbard model. The 9.5-eV "mystery" peak in the photoelectron spectra for Y is identified as arising from a state with two holes localized on nearest-neighbor oxygen atoms. Hubbard parameters are obtained from the data and found to be larger than expected for metallic systems.
Keywords
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