Interlayer tunnelling mechanism: experimental test of single layer compounds

AA Tsvetkov*, D van der Marel, D Dulic, HJ Molegraaf, NN Kolesnikov, B Willemsen, ZF Ren

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    The c-axis optical properties of cuprate superconductors have been studied by grazing angle reflectivity technique. We tested the interlayer tunnelling (ILT) model of high temperature superconductivity and showed that the basic relation between the condensation energy of the superconducting state and the interlayer Josephson coupling does not hold for Tl(2)Ba(2)CuO(6). Measuring the reflectivity at an oblique angle of incidence on the ab-surface of Tl(2)Ba(2)CuO(6), we found the c-axis plasma resonance at 28 cm(-1). The corresponding Josephson coupling energy is at least an order of magnitude lower than the condensation energy determined from the specific heat measurements. In the double layer compound Tl(2)Ba(2)CaCu(2)O(8) the c-axis plasma resonance was observed at 26 cm(-1). The c-axis penetration depth and the c-axis conductivity follow the Ambegaokar-Baratoff or "dirty limit" superconductor relation if a very small energy gap is assumed.

    Original languageEnglish
    Title of host publicationSUPERCONDUCTING SUPERLATTICES II: NATIVE AND ARTIFICIAL
    Editors Bozovic, D Pavuna
    Place of PublicationBELLINGHAM
    PublisherSPIE - INT SOC OPTICAL ENGINEERING
    Pages2-10
    Number of pages9
    ISBN (Print)0-8194-2935-X
    DOIs
    Publication statusPublished - 1998
    EventConference on the Superconducting Superlattices II - Native and Artificial - , Canada
    Duration: 20-Jul-199822-Jul-1998

    Publication series

    NameProceedings of SPIE-The International Society for Optical Engineering
    PublisherSPIE-INT SOC OPTICAL ENGINEERING
    Volume3480
    ISSN (Print)0277-786X

    Other

    OtherConference on the Superconducting Superlattices II - Native and Artificial
    Country/TerritoryCanada
    Period20/07/199822/07/1998

    Keywords

    • Josephson plasmon
    • interlayer tunnelling model
    • T-C SUPERCONDUCTIVITY
    • CUO2 PLANES
    • PSEUDOGAP
    • MODELS

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