Journal of Low Temperature Physics

, Volume 105, Issue 3–4, pp 563–568

Tunneling measurements of the superconductor Nd1.85C0.15CuO4−δ

  • Toshikazu Ekino
  • Takashi Doukan
  • Hironobu Fujii
Symmetry of the Order Parameter


We report tunneling measurements of the electron-doped superconductor Nd1.85Ce0.15Cu04−gd using break junctions. The observed finest gap structure is well expressed by the BCS density of states with the energy gap of Δ = 6.1 meV and a very small broadening parameter, having the ratio 2Δ/kBTc = 8.2 with Tc = 17.3 K. These features are similar to our tunneling results for the hole-doped cuprate superconductors. Therefore we find no essential difference in the gap structure, in spite of a common believing of the pairingsymmetry difference between them.

PACS numbers

74.50.+r 74.72.−h 


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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Toshikazu Ekino
    • 1
  • Takashi Doukan
    • 1
    • 2
  • Hironobu Fujii
    • 1
  1. 1.Faculty of Integrated Arts and SciencesHiroshima UniversityHigashi-HiroshimaJapan
  2. 2.Faculty of ScienceHiroshima UniversityHigashi-HiroshimaJapan

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