Broader perspective on the high-temperature superconducting YBa2Cu3Oy system: The real role of the oxygen content
Y. Tokura, J. B. Torrance, T. C. Huang, A. I. Nazzal
DOI 10.1103/PhysRevB.38.7156 · Physical Review B
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Abstract
A series of new YBa2Cu3Oy-like materials are reported in which the oxygen content and the average [Cu-O] charge (or Cu valence) are separately varied over a wide range. We find a distinct boundary between samples showing anomalous insulating behavior and those with high Tc. These data are interpreted to demonstrate that the [Cu-O] charge in the sheets largely determines Tc and that the variable oxygen content and the chains merely provide an insulating reservoir of charge.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | zero_resistance |
| CaLaBaCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | zero_resistance |
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