Phonon density of states of superconducting YBa2Cu3O7 and the nonsuperconducting analog YBa2Cu3O6
J. J. Rhyne, D. A. Neumann, J. A. Gotaas, F. Beech, L. Toth, S. Lawrence, S. Wolf, M. Osofsky, D. U. Gubser
DOI 10.1103/PhysRevB.36.2294 · Physical Review B
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Abstract
Neutron scattering has been used to study the vibrational density of states and the atomic structure of the high-temperature superconductor YBa2Cu3O7, and the analogous nonsuperconducting compound YBa2Cu3O6. The density of states of the superconductor shows a strong double peak at about 20 meV and a second major maximum near 70 meV with additional less-intense features present at intermediate energies. The YBa2Cu3O6 material shows a similar energy spectrum above 45 meV; however, below this energy there are significant differences associated with the O vacancies in the linear b-axis chain site.
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. | 93 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | zero_resistance |
| Y1.2Ba0.8CuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
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