Variation of the local work function at steps on metal surfaces studied with STM

J. F. Jia, K. Inoue, Y. Hasegawa, W. S. Yang, T. Sakurai

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Abstract

With a scanning tunneling microscope we have measured the apparent barrier height (ABH) on large terraces of the clean Cu(111) surface and large Au(111) terraces of the Au/Cu(111) surface, and the results are in good agreement with the correspondent surface work function. From the ABH images of these surfaces low-value valleys along steps are clearly visible, as expected from "Smoluchowki smoothing." A simple simulation of the valley makes us to be able to determine that the smoothing-induced dipole moment for Au and Cu steps is 0.16±0.05 and 0.5±0.15 D/step atom, respectively.

Original languageEnglish
Pages (from-to)1193-1196
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number3
Publication statusPublished - 1998 Jul 15

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Jia, J. F., Inoue, K., Hasegawa, Y., Yang, W. S., & Sakurai, T. (1998). Variation of the local work function at steps on metal surfaces studied with STM. Physical Review B - Condensed Matter and Materials Physics, 58(3), 1193-1196.