Characterization of intrinsic Josephson junctions for La2-xSrxCuO4 single crystals

Y. Uematsu, Y. Mizugaki, K. Nakajima, T. Yamashita, S. Watauchi, I. Tanaka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We have fabricated c-axis micro-bridges of La2-xSrxCuO4 (LSCO) single crystals in order to characterize the LSCO intrinsic Josephson junctions (IJJs). The current-voltage characteristics of the micro-bridges exhibited a large hysteresis with a voltage jump of the order 0.5-3 V and no multiple branching structures. A superconducting energy gap was clearly observed on the quasi-particle branch and showed BCS-like temperature dependence. In addition, the temperature dependence of the critical current of the IJJ was in good agreement with the theoretical curves for superconductor-insulator-superconductor (SIS) Josephson junctions. These results demonstrate that the IJJs of LSCO are characterized as stacked series SIS junctions.

Original languageEnglish
Pages (from-to)382-387
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - 2002 Feb 15


  • Intrinsic Josephson effect
  • LaSrCuO

ASJC Scopus subject areas

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


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