Role of structural disorder in artificially layered high-temperature superconductors
G. Balestrino, A. Crisan, S. Lavanga, P. G. Medaglia, G. Petrocelli, A. A. Varlamov
DOI 10.1103/PhysRevB.60.10504 · Physical Review B
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Abstract
The electrical transport properties of (BaCuO2)2/(CaCuO2)2 superconducting artificial structures, grown by pulsed laser deposition stacking in sequence nonsuperconducting individual BaCuO2 and CaCuO2 layers, have been studied. Such artificially layered materials have Tc values up to 80 K and show a number of unusual properties such as the relatively high normal state resistivity with a nonlinear dependence on temperature, the enhanced thermodynamic fluctuations, the relatively low value of the critical temperature with respect to the natural compounds with the same number of CuO2 planes, and the same carrier concentration. It is demonstrated that such properties can be explained if the high level of structural disorder, typical of these artificial structures, is considered.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BaCuO2)2/(CaCuO2)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| (BaCuO2)2/(CaCuO2)2.3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| Bi2Sr2Ca2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 100 | Pressure not reported | unknown |
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