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Tunneling spectroscopy of superconducting Y1−xPrxBa2Cu3O7 thin films

  • HTSC—Weak Links, Tunnelling, Josephonson Effects, Proximity Effect
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Czechoslovak Journal of Physics Aims and scope

Abstract

A systematic study of the conductance of Y1−xPrxBa2Cu3O7/Pb planar tunnel junctions as a function of Pr concentration, x, and crystallographic orientation is presented. For fixed Pr concentration, the tunneling conductance is the same when tunneling into (100)-, (110)-, and (103)-oriented films, but qualitatively different than tunneling into (001)-oriented films. In addition, the gap-like feature energy (∼2kBTc) scales with Tc, but only when tunneling in the ab-plane direction. An ongoing experiment characterizing a novel tunnel junction fabrication technique using self-assembled monolayers as insulating tunnel barriers is also discussed.

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Authors and Affiliations

  1. Dept. of Physics, Univ. of Illinois at Urbana-Champaign, 1110 W. Green St., 61801, Urbana, IL, USA

    M. Covington, W. L. Feldmann & L. H. Greene

  2. Dept. of Chemistry, Northwestern University, 2145 Sheridan Rd., 60208, Evanston, IL, USA

    F. Xu & C. A. Mirkin

Authors
  1. M. Covington
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  2. F. Xu
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  3. C. A. Mirkin
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  4. W. L. Feldmann
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  5. L. H. Greene
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Additional information

Supported by the NSF through the Science and Technology Center for Superconductivity (NSF DMR 91-20000)

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Covington, M., Xu, F., Mirkin, C.A. et al. Tunneling spectroscopy of superconducting Y1−xPrxBa2Cu3O7 thin films. Czech J Phys 46 (Suppl 3), 1341–1342 (1996). https://doi.org/10.1007/BF02562785

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  • DOI: https://doi.org/10.1007/BF02562785

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