Absence of specific-heat anomaly at the superconducting transition in La1.8Ba0.2CuO4−y
L. E. Wenger, J. T. Chen, Gary W. Hunter, E. M. Logothetis
DOI 10.1103/PhysRevB.35.7213 · Physical Review B
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Abstract
Calorimetric measurements between 2 and 95 K show no specific-heat anomaly at the superconducting transition temperature of 28 K in La1.8Ba0.2CuO4−y within our 1% resolution. This indicates that the total condensation energy associated with the superconducting transition is either very small, possibly resulting from only those electrons in interfacial (two-dimensional) layers, or zero as a result of a different mechanism for bulk superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.8Ba0.2CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28 | Pressure unresolved | zero_resistance |
| La1.8Ba0.2CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure unresolved | onset |
| La1.8Ba0.2CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28 | Pressure unresolved | unknown |
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