Scanning tunneling microscopy measurements of the local work function around steps on the Au/Cu(111) surface

Jin Feng Jia, Keisuke Inoue, Yukio Hasegawa, Wei Sheng Yang, Toshio Sakurai

    Research output: Contribution to journalArticlepeer-review

    Abstract

    With a scanning tunneling microscope we have taken local work function images of the Au/Cu(111) surface. The local work function measured from large Au-covered terraces is in good agreement with the result obtained by non-local techniques, and the local work function around step edges is significantly lower than that on terraces. The experimental details of the local work function lowering around a step can be reproduced nicely with a simple simulation if a dipole moment row with a proper linear density is put at the center of the step and if the influence of the topographic change of the step due to formation of the dipole moment is taken into account. It is demonstrated that STM has the ability to reveal the details of how local work function varies around steps and other defects on metal surfaces.

    Original languageEnglish
    Pages (from-to)105-108
    Number of pages4
    JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
    Volume44
    Issue number1
    Publication statusPublished - 1997 Dec 1

    Keywords

    • Copper
    • Gold
    • Local work function
    • Scanning tunneling microscopy
    • Surface steps

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Metals and Alloys

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