Oxygen order-disorder transition in the superconductor YBa2Cu3O6+δ
J. M. Sanchez, F. Meja-Lira, J. L. Moran-Lopez
DOI 10.1103/PhysRevB.37.3678 · Physical Review B
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Abstract
The order-disorder transition involving oxygen atoms and vacancies in the Cu-O basal plane of the YBa2Cu3O6+δ superconductor is studied using the cluster-variation method in the square approximation. We are able to reproduce most of the features observed in recent neutron-diffraction experiments by assuming that the chemical potential in the solid and gas phases varies linearly with temperature, and that the dominant interaction for the order-disorder transition is the oxygen-oxygen nearest-neighbor repulsion.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6+δ 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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