Abstract
Abstract Measurements of the electrical resistivity in YBCO-PrBCO superlattices are reported. The resistivity curves directly above T c were analysed using various theoretical models describing weak fluctuations in layered superconductors and considering both Aslamazov-Larkin (AL) and Maki-Thompson (MT) terms. A 3D-2D crossover and strong enhancement of fluctuation-enhanced conductivity, σ′, above the crossover temperature were revealed for all samples studied. From the analysis for a typical 7 × 7 superlattice ξ c (0) = 0.14 ± 0.01 nm and τ ϕ ⋍ 8 × 10 −13 s , are derived for the interlayer coherence length and phase-relaxation time, respectively. This implies k B T c ⋍ 7z.xl;h/τ ϕ , indicating the absence of significant pair-breaking in these high- T c superconductors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
