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Chemical reaction and interface formation on InAs(1 1 1)–Co surfaces

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
574
Identifiers
DOI: 10.1016/j.susc.2004.10.033
Keywords
  • Inas(1 1 1)
  • Cobalt
  • Photoelectron Spectroscopy
  • Surface Reaction
Disciplines
  • Chemistry

Abstract

Abstract We report a study of the initial interface formation of Co on InAs(1 1 1)A and B surfaces using high resolution photoelectron spectroscopy and scanning tunneling microscopy. We observe a strong chemical interaction between Co and, in particular, surface indium forming a metallic overlayer already below monolayer coverage. On annealed surfaces this overlayer agglomerates into islands, with a narrow size distribution. Furthermore, no two-dimensional electron gas is formed on InAs(1 1 1)A–Co in contrast to the clean surface.

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