Identification of a superoxide in superconducting La2CuO4+δ by x-ray photoelectron spectroscopy
J. W. Rogers, Jr., N. D. Shinn, J. E. Schirber, E. L. Venturini, D. S. Ginley, B. Morosin
DOI 10.1103/PhysRevB.38.5021 · Physical Review B
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Abstract
X-ray photoelectron spectroscopic and annealing studies of ceramic La2CuO4+δ prepared by high-temperature and high-pressure oxygen enrichment have identified a superoxide as the predominant oxygen species (δ≊0.13) correlated with a superconducting transition at Tc≊30 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | zero_resistance |
| La2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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