Pressure dependence of Tc in L2−xMxCuO4−y (L=Pr,Nd,Sm,Eu; M=Ce,Th): Antisymmetric behavior of electron- versus hole-doped copper-oxide superconductors
J. T. Markert, J. Beille, J. J. Neumeier, E. A. Early, C. L. Seaman, T. Moran, M. B. Maple
DOI 10.1103/PhysRevLett.64.80 · Physical Review Letters
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Abstract
Measurements of the superconducting transition temperature Tc in the electron-doped copper-oxide compounds L2−xMxCuO4−y under pressure P to ∼20 kbar reveal that, in general, Tc decreases with P, in contrast to the behavior of hole-doped copper-oxide compounds. The quantity d lnTc/d lnV exhibits a dependence on Tc similar to that of hole-doped compounds, but opposite in sign, and can be as large as ∼24. Correlation of structural and transport properties indicates competition between interlayer and intralayer effects in these materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr1.85Th0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure unresolved | onset |
| Nd1.85Ce0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd1.85Th0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Sm2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.9 | Pressure unresolved | onset |
| Sm2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.7 | Pressure unresolved | onset |
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