Adsorption of potassium on Co(0001)

T. Vaara, Jukka Vaari, J. Lahtinen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

The structures of potassium overlayers on Co(0001) surface at several coverages and temperatures have been studied using work function measurements, XPS, TDS and LEED. A tentative structural phase diagram was constructed. In the coverage range from 0.17 ML to 0.31 ML a (2×2) structure was seen. Splitting of the (2×2) LEED beams was observed above 0.31 ML suggesting formation of rotated domains in the potassium layer. The rotated structure occured in an abrupt manner at the onset of the second potassium layer formation. The effects of adsorbate-adsorbate and adsorbate-substrate interactions to the structural and electronic properties of the K/Co(0001) system are discussed.

Original languageEnglish
Pages (from-to)88-97
Number of pages10
JournalSurface Science
Volume395
Issue number1
DOIs
Publication statusPublished - 1 Jan 1998
MoE publication typeA1 Journal article-refereed

Keywords

  • Alkali metals
  • Cobalt
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Surface structure
  • Thermal desorption spectroscopy
  • X-ray photoelectron spectroscopy

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