YBa2CU3O7/PrBa2Cu3O7 superlattices: Properties of Ultrathin superconducting layers separated by insulating layers

J. M. Triscone, O. Fischer, O. Brunner, L. Antognazza, A. D. Kent, M. G. Karkut

    Research output: Contribution to journalArticle

    Abstract

    We have artificially varied the coupling between ultrathin YBa2Cu3O7 layers by interposing insulating planes of PrBa2Cu3O7 in multilayers and studied the consequences of decoupling 12-A YBa2Cu3O7 unit cells on the superconducting properties. We find that the Tc (midpoint) of a 12-A/12-A multilayer is 55 K, twice that of the corresponding alloy. Tc decreases linearly with further separation of the YBa2Cu3O7 unit cells, the transition width increases and shows evidence of 2D fluctuations, and the influence of a magnetic field parallel to the layers is markedly reduced.

    Original languageEnglish (US)
    Pages (from-to)804-807
    Number of pages4
    JournalPhysical Review Letters
    Volume64
    Issue number7
    DOIs
    StatePublished - Jan 1 1990

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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