Effect of doping and impurities on the oxygen isotope effect in high-temperature superconducting cuprates
D. J. Pringle, G. V. M. Williams, J. L. Tallon
DOI 10.1103/PhysRevB.62.12527 · Physical Review B
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Abstract
We report measurements of the oxygen isotope effect in high-temperature superconductors. We extend previous oxygen isotope measurements to high hole concentrations and show that the data can be analyzed in terms of a hole-concentration-independent oxygen isotope effect in the overdoped region. Measurements of the oxygen isotope effect in YBa2(Cu1−xNix)4O8 are also presented. We show that the hole-concentration- and impurity-concentration-induced changes in the isotope-effect coefficient can be consistently modeled by including the effect of the normal-state pseudogap.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2(Cu1-xNix)4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81 | Pressure not reported | onset |
| Y1-yCayBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | onset |
| Y0.84Ca0.16Ba2Cu3O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y0.8Ca0.2Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| PrBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| La2-ySryCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | unknown |
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