Scanning tunneling potentiometry studies of Y1Ba2Cu3O7_xand gold thin films

A. D. Kent, I. Maggio-Aprile, Ph Niedermann, Ch Renner, O. Fischer

    Research output: Contribution to journalArticle

    Abstract

    We have used a scanning tunneling microscope to study the local electrostatic potential distribution and topography of thin films of gold at room temperature and high-Tc superconducting thin films at low temperature in the presence of a transport current. On continuous gold thin films (85 A thick), high resolution scans often show abrupt changes in the potential, which are clearly associated with topographic features. On a relatively large scale (1 µm), a more uniform potential drop is observed but locally these scans also reveal small steps in the potential. These steps may be a characteristic property of transport in these thin polycrystalline films or, alternatively, could be artifacts due to discontinuous changes in the tunneling position on the sample during scanning. On high-Tcsuperconducting thin films, a thin gold overlayer permits potentiometry studies at low temperature. The first low-temperature potentiometry studies show a clear change in behavior at the normal-superconductor transition.

    Original languageEnglish (US)
    Pages (from-to)459-463
    Number of pages5
    JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
    Volume8
    Issue number1
    DOIs
    StatePublished - 1990

    Fingerprint

    potentiometric analysis
    Gold
    gold
    Scanning
    Thin films
    scanning
    thin films
    Temperature
    Superconducting films
    Topography
    Superconducting materials
    Electrostatics
    Microscopes
    artifacts
    topography
    microscopes
    electrostatics
    high resolution
    room temperature

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

    Cite this

    Scanning tunneling potentiometry studies of Y1Ba2Cu3O7_xand gold thin films. / Kent, A. D.; Maggio-Aprile, I.; Niedermann, Ph; Renner, Ch; Fischer, O.

    In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, Vol. 8, No. 1, 1990, p. 459-463.

    Research output: Contribution to journalArticle

    Kent, A. D. ; Maggio-Aprile, I. ; Niedermann, Ph ; Renner, Ch ; Fischer, O. / Scanning tunneling potentiometry studies of Y1Ba2Cu3O7_xand gold thin films. In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 1990 ; Vol. 8, No. 1. pp. 459-463.
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