Utilization of a Hubbard U model to understand the valence-band photoelectron data for the high-temperature superconductors
D. E. Ramaker
DOI 10.1103/PhysRevB.38.11816 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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