2007
DOI: 10.1103/physrevb.76.052508
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Quantitative model for theICRproduct ind-wave Josephson junctions

Abstract: We study theoretically the Josephson effect in d-wave superconductor/diffusive normal metal/insulator/ diffusive normal metal/d-wave superconductor ͑D/DN/I/DN/D͒ junctions. This model aims to describe practical junctions in high-T C cuprate superconductors, in which the product of the critical Josephson current ͑I C ͒ and the normal state resistance ͑R͒ ͑the so-called I C R product͒ is very small compared to the prediction of the standard theory for clean d-wave superconductor/insulator/d-wave superconductor ͑… Show more

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Cited by 11 publications
(11 citation statements)
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“…Here, d is the thickness of dirty layers coating the electrodes, and l the quasiparticle mean free path. A similar model was studied by another group [45], with the same conclusions being made. If the roughness is weak, the interplay between the proximity effect at the boundary with the normal-state diffusive layer and the midgap resonance states may lead to a nonmonotonic ( ) J I T dependence [26,42,43,[46][47][48][49].…”
Section: Introductionsupporting
confidence: 57%
“…Here, d is the thickness of dirty layers coating the electrodes, and l the quasiparticle mean free path. A similar model was studied by another group [45], with the same conclusions being made. If the roughness is weak, the interplay between the proximity effect at the boundary with the normal-state diffusive layer and the midgap resonance states may lead to a nonmonotonic ( ) J I T dependence [26,42,43,[46][47][48][49].…”
Section: Introductionsupporting
confidence: 57%
“…Notethat for > /4, the sign of the current changes. Thus, in this case the junction isformed [30]. In order to analyze the Josephson critical current of granular d-wave superconductor, we consider Meilikhov's model, in which, the weak link between grains is formed in the region of plane segments [36].…”
Section: -Formalismmentioning
confidence: 99%
“…On the other hand, the nature of the high-T c materials results in new aspects like anisotropy of the parameters with crystal orientation, pairing symmetry (d-wave instead of conventional s-wave), high penetration depth and small coherence length. Tanaka and Kashiwaya (1997), Golubov and Tafuri (2000), Yokoyama et al (2007), and references therein. Another physics is related to high-T c cuprate superconductors because they have an atomically layered structure of superconducting sheets S and S′ separated by insulating or normal conducting layers with different coupling strengths t and t′, respectively (see Fig.…”
Section: Josephson Effectsmentioning
confidence: 99%