The observation of non-integral Shapiro steps of a high-Tc superconducting dc SQUID

J. D. Chern, H. C. Yang, J. H. Lu, H. E. Horng

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An unusual oscillatory behavior of the magnitude of non-integral Shapiro steps versus applied magnetic fields was observed, on a bi-epitaxial dc SQUID, illuminated by a microwave source. Preliminary results suggest that the expected position of the first Shapiro step was splitted into two steps; one is larger, while the other smaller than the magnitude of the expected step. A proposed reason for the observation of non-integral steps is attributed to the possible existence of a finite resistance, connected in series to one of the single Josephson junctions, in the asymmetric dc SQUID circuitry, causing a splitting effect of the Shapiro steps.

Original languageEnglish
Pages (from-to)2451-2452
Number of pages2
JournalPhysica C: Superconductivity and its applications
Issue numberPART 4
Publication statusPublished - 1997 Aug


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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