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Tunneling Spectroscopy and Energy Gap of High Tc Oxide Superconductors

  • J. S. Tsai
  • I. Takeuchi
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 89)

Abstract

Problems associated with the tunneling experiments of the high-Ta oxidesuperconductors are discussed in this paper. Local variations in Tc, multiple gap like structures, gap anisotropy, and the broadened and leaky gap structures are considered. New results of the experiments that reported the gap anisotropies are reviewed here. They all give the anisotropic factor of about 1.5~2. Several probable tunneling models that give the broadened gap structures are considered. The gap value of 2Δ(0)≃4~6 kBTc is inferred from these models in Nd-Ce-Cu-O, Y-Ba-Cu-O, Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O compounds.

Keywords

Tunnel Junction Anisotropic Factor Tunneling Spectroscopy Oxide Superconductor Solid State Comm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • J. S. Tsai
    • 1
  • I. Takeuchi
    • 1
  1. 1.Microelectronics Research LaboratoriesNEC CorporationTsukuba 305Japan

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