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Metallic Weak-Link Character of Grain Boundaries in High-Tc Materials

  • R. Nicolsky
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 113)

Abstract

The intrinsic current-voltage characteristics (CVC) of high-Tc materials are analysed in the frame of a recent microscopic theory of metallic (nontunnelling) Josephson junctions, suitable for SNS systems. The comparison of the theoretical model with experimental CVC of grain boundaries shows that those intrinsic juntions exhibit the essential features of metallic weak links and definitely do not act as tunnelling junctions. As a consequence, the grain boundaries are also responsible for the presence of intrinsic normal electrons in the superconducting state of high-Tc superconductors.

Keywords

Grain Boundary Critical Current Density Josephson Junction Pair Potential Normal Metal 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1993

Authors and Affiliations

  • R. Nicolsky
    • 1
  1. 1.Instituto de FísicaUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil

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