Proximity-effect tunneling in Pd-Pb sandwiches

L. Dumoulin, P. Nedellec, P. M. Chaikin

    Research output: Contribution to journalArticle

    Abstract

    Tunneling characteristics of junctions of the form AlOx-Pd-Pb are reported. From the thickness dependences of Tc and the induced gaps we find that the total BCS interaction (NV) in Pd is 0±0.05. We find a Fermi velocity of ∼ 0.2×108 cm/sec indicating that the narrow d-band electrons dominate our measurements. Pd phonon structure is not resolved, setting an upper limit of λ0.2 for the effective electron-phonon interaction. These results indicate that paramagnon effects are substantially less important for superconductivity than was previously envisioned.

    Original languageEnglish (US)
    Pages (from-to)208-211
    Number of pages4
    JournalPhysical Review Letters
    Volume47
    Issue number3
    DOIs
    StatePublished - 1981

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    electron phonon interactions
    superconductivity
    electrons
    interactions

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Proximity-effect tunneling in Pd-Pb sandwiches. / Dumoulin, L.; Nedellec, P.; Chaikin, P. M.

    In: Physical Review Letters, Vol. 47, No. 3, 1981, p. 208-211.

    Research output: Contribution to journalArticle

    Dumoulin, L, Nedellec, P & Chaikin, PM 1981, 'Proximity-effect tunneling in Pd-Pb sandwiches', Physical Review Letters, vol. 47, no. 3, pp. 208-211. https://doi.org/10.1103/PhysRevLett.47.208
    Dumoulin, L. ; Nedellec, P. ; Chaikin, P. M. / Proximity-effect tunneling in Pd-Pb sandwiches. In: Physical Review Letters. 1981 ; Vol. 47, No. 3. pp. 208-211.
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