Phonon density of states of the YBa2Cu3Oy superconducting ceramics
L. Mihály, L. Rosta, G. Coddens, F. Mezei, Gy. Hutiray, G. Kriza, B. Keszei
DOI 10.1103/PhysRevB.36.7137 · Physical Review B
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Abstract
Neutron scattering measurements were performed on polycrystalline Y-Ba-Cu-O ceramics to explore the relationship between structure, phonon spectrum, and superconductivity. No evidence was seen for soft phonon modes. The superconducting transition temperature of the compound was tuned by heat treatments. Although oxygen removal leads to changes in the lattice parameters and the time-of-flight spectrum indicates a general softening of the lattice, the characteristic features in the phonon density of states remain unchanged.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6.98 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure unresolved | unknown |
| YBa2Cu3O6.62 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure unresolved | onset |
| YBa2Cu3O6.62 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10 | Pressure unresolved | zero_resistance |
| YBa2Cu3O7.00 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure unresolved | unknown |
| La1.85Sr0.15CuO4 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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