Pressure dependence of the oxygen isotope effect in the superconductor YBa2Cu4O8
N. Suresh, J. G. Storey, G. V. M. Williams, J. L. Tallon
DOI 10.1103/PhysRevB.78.100503 · Physical Review B
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Abstract
We have carried out measurements of the pressure dependence to 1.2 GPa of the oxygen isotope effect on Tc in the high-Tc superconductor YBa2Cu4O8 using a clamp cell in a superconducting quantum interference device magnetometer. This compound lies close to, but just above, the 1/8th doping point where in La2−xSrxCuO4 marked anomalies in isotope effects occur. Both isotopes show the same very large pressure dependence of Tc with the result that the isotope exponent remains low (∼0.08), increasing slowly with pressure. This is discussed in terms of stripes, a competing pseudogap, and fluctuations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81.6 | Pressure unresolved | onset |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80.82 | Pressure unresolved | onset |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y2Ba4Cu7O15-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y1-yCayBa2Cu3O7-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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