dc.contributor.author |
Cardoso, JL |
|
dc.contributor.author |
Pereyra, P |
|
dc.date.accessioned |
2011-01-22T10:27:35Z |
|
dc.date.available |
2011-01-22T10:27:35Z |
|
dc.date.issued |
2000 |
|
dc.identifier.issn |
1098-0121 |
|
dc.identifier.uri |
http://hdl.handle.net/11154/2122 |
|
dc.description.abstract |
A simple expression for the transport critical current, which describes rather well the Ambegaokar-Baratoff (A-B) to Ginsburg-Landau (G-L) crossover, is obtained from an elementary analysis of a Josephson junction subject to external magnetic fields within the Ginsburg-Landau theory. We show that the order parameter in the intergrain region depends crucially on the interplay of two characteristic lengths: the superconducting coherence length xi proportional to(1-T/T-c)(-1/2) and the junction-induced superconducting decoherence length zeta(q)proportional to(1 - T/T-c)(-alpha). Data for the transport critical current in granular YBCO samples are presented, and the A-B to G-L crossovers successfully described. |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
Critical currents and the Ambegaokar-Baratoff to Ginsburg-Landau crossover in granular superconductors |
en_US |
dc.type |
Article |
en_US |
dc.identifier.idprometeo |
2566 |
|
dc.source.novolpages |
61(9):6360-6365 |
|
dc.subject.wos |
Physics, Condensed Matter |
|
dc.description.index |
WoS: SCI, SSCI o AHCI |
|
dc.relation.journal |
Physical Review B |
|