Anomalous behavior of Tc and pseudogap in the superconductor CaxLa1−xBa1.75−xLa0.25+xCu3Oy with respect to doping and ion size
J. L. Tallon
DOI 10.1103/PhysRevB.90.214523 · Physical Review B
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Abstract
The cuprate superconductor CaxLa1−xBa1.75−xLa0.25+xCu3Oy has been proposed as a model system which allows systematic variation in the optimum transition temperature, Tc,max, with doping and ion size. However, we show that the Tc,max values are anomalous in this system. We determine the doping accurately and show that the phase curve, as a function of doping, is anomalously truncated so that values of Tc,max appear to decrease with decreasing x, concealing the generic increase expected as ion size increases. We also thereby resolve its reported anomalous pseudogap behavior from NMR and anomalous superconducting gap from angle-resolved photoemission spectroscopy.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CaxLa1-xBa1.75-xLa0.25+xCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 41 | Pressure not reported | unknown |
| CaxLa1-xBa1.75-xLa0.25+xCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 46 | Pressure not reported | unknown |
| CaxLa1-xBa1.75-xLa0.25+xCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 58 | Pressure not reported | unknown |
| CaxLa1-xBa1.75-xLa0.25+xCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 72 | Pressure not reported | unknown |
| CaxLa1-xBa1.75-xLa0.25+xCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81 | Pressure not reported | unknown |
| LaBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 98.5 | Pressure not reported | unknown |
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