Scanning tunneling spectroscopy on YBa2Cu3Oy/PrBa2Cu3O y/YBa2Cu3Oy sandwiched junctions and YBa2Cu3Oy/Y0.5Pr 0.5Ba2Cu3Oy superlattices

H. C. Yang, H. W. Yu, C. C. Kuo, H. E. Horng, S. Y. Yang

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    Abstract

    The differential conductance, (dI/dV), on YBa2Cu3Oy/PrBa2Cu3O y/YBa2Cu3Oy (YBCO/PBCO/YBCO) sandwiched junctions and YBa2Cu3Oy/Y0.5Pr 0.5Ba2Cu3Oy (YBCO/YPBCO) superlattices was measured with STM at various temperature ranges to investigate the proximity effects. The dI/dV curves show conductance peaks at low temperatures and the energy gap, 2Δab, derived from the peaks is equal to about 46 meV for YBCO/PBCO/YBCO sandwiched junctions, which is consistent with the data obtained from reported data on YBCO single crystals whereas the YBCO/YPBCO ((120 Å/60 Å)x8) superlattices, due to the reduction of Tc, show smaller gap value.

    Original languageEnglish
    Pages (from-to)2443-2444
    Number of pages2
    JournalPhysica C: Superconductivity and its applications
    Volume282
    Issue numberPART 4
    DOIs
    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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    Dive into the research topics of 'Scanning tunneling spectroscopy on YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/PrBa<sub>2</sub>Cu<sub>3</sub>O <sub>y</sub>/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> sandwiched junctions and YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/Y<sub>0.5</sub>Pr <sub>0.5</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> superlattices'. Together they form a unique fingerprint.

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