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Title: Proximity effect in BSCCO intrinsic Josephson junctions contacted with a normal metal layer
Authors: Suzuki, Minoru
Koizumi, Masayuki
Ohmaki, Masayuki
Kakeya, Itsuhiro  kyouindb  KAKEN_id
Shukrinov, Yu M.
Keywords: Proximity effect
Intrinsic Josephson junctions
Critical Josephson current
high-Tc superconductors
Issue Date: 2012
Publisher: Elsevier Ltd.
Journal title: Physics Procedia
Volume: 36
Start page: 205
End page: 210
Abstract: Superconductivity proximity effect is numerically evaluated based on McMillan's tunneling proximity model for a sandwich of a normal metal layer on top of the surface superconducting layer of intrinsic Josephson junctions in a Bi2Sr2CaCu2O8+δ (BSCCO) crystal. Due to the very thin thickness of 0.3 nm of the superconducting layer in IJJs, the surface layer is subject to influence of the proximity effect when the top layer is contacted with a normal metal layer. The effect manifests itself as a significant change in the characteristics of the IJJ surface Josephson junction. It is found that when the superconducting layer thickness is smaller than 0.6 nm, the pair potential reduces significantly, leading to an almost complete suppression of the critical Josephson current density for the surface junction. This result can partly explain the experimental results on the IJJ characteristics of a mesa type structure.
Rights: This article is Under a Creative Commons license
© 2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors
DOI(Published Version): 10.1016/j.phpro.2012.06.072
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