Cooperative weak links in sintered Y-Ba-Cu-O superconductor
Lu Li, Duan Hong-min, Zhang Dian-lin
DOI 10.1103/PhysRevB.37.3681 · Physical Review B
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Abstract
The I-V characteristics of Y-Ba-Cu-O have been measured for several temperatures below Tc. A clear ‘‘footlike’’ structure is developed when the temperature goes down from Tc, strongly reminiscent of the case in superconducting weak links. The energy gap derived from the critical current and the ‘‘excess current’’ is about 18.4 meV at T=0 and with a roughly Bardeen-Cooper-Schrieffer-type of variation at T>0. The results are indicative of a kind of ‘‘cooperative’’ weak link behavior in sintered superconducting Y-Ba-Cu-O.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | midpoint |
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