Temperature dependence of the critical current in YBa2Cu3O7-δ and Bi2Sr2Ca1Cu2O8 Josephson junctions

B. A. Aminov, N. B. Brandt, Nguyen Min Thuy, Ya G. Ponomarev, M. V. Sudakova, A. R. Kaul, I. E. Graboi, Yu D. Tretiakov, J. Wittig, S. P. Kobeleva, L. M. Fisher, L. Rosta

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Abstract

We have studied the stationary Josephson effect on YBa2Cu3O7-δ (Tc=90 K) and Bi2Sr2Ca1Cu2 O8 (Tc=80 K and 87 K for two samples of different origin) ceramic based junctions. The temperature dependence of the critical current near Tc has been found as Ic≈(Tc-T) 3 2 for the Y-Ba-Cu-O samples indicating that they should be classified as S-N-I-N-S type junctions. The I-V curves of the Bi-Sr-Ca-Cu samples show the typical behaviour of S-I-S structures. Using Ambegaokar-Baratoff's theory for Bi2Sr2Ca1Cu2O8, the temperature dependence of the superconducting state gap Δ(T) was calculated and it was evaluated that 1.45≤2Δ(0)/kBTc≤3.5.

Original languageEnglish
Pages (from-to)505-510
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume160
Issue number5-6
DOIs
Publication statusPublished - Oct 1 1989

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Aminov, B. A., Brandt, N. B., Thuy, N. M., Ponomarev, Y. G., Sudakova, M. V., Kaul, A. R., Graboi, I. E., Tretiakov, Y. D., Wittig, J., Kobeleva, S. P., Fisher, L. M., & Rosta, L. (1989). Temperature dependence of the critical current in YBa2Cu3O7-δ and Bi2Sr2Ca1Cu2O8 Josephson junctions. Physica C: Superconductivity and its applications, 160(5-6), 505-510. https://doi.org/10.1016/0921-4534(89)90427-9