Scanning tunneling spectroscopy of a vortex core from the clean to the dirty limit

Ch Renner, A. D. Kent, Ph Niedermann, Fischer, F. Lévy

    Research output: Contribution to journalArticle


    The local density of states of a superconducting vortex core has been measured as a function of disorder in the alloy system Nb1-xTaxSe2 using a low-temperature scanning tunneling microscope. The peak observed in the zero-bias conductance at a vortex center is found to be very sensitive to disorder. As the mean free path is decreased by substitutional alloying the peak gradually disappears and for x=0.2 the density of states in the vortex center is found to be equal to that in the normal state. The vortex-core spectra hence may provide a sensitive measure of the quasiparticle scattering time.

    Original languageEnglish (US)
    Pages (from-to)1650-1652
    Number of pages3
    JournalPhysical Review Letters
    Issue number12
    StatePublished - Jan 1 1991


    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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