Substitutional adsorption of K on Fe(100)

Substitutional adsorption of K on Fe(100)

The adsorption of potassium on Fe(100) was studied by time-of-flight forward scattering and recoiling spectroscopy (TOF-SARS), low energy electron diffraction (LEED) and Auger electron spectroscopy (AES). After heating to 650 K of the potassium saturated surface the formation of a p(3 × 3) potassium...

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Veröffentlicht in:Surface science 1996-01, Vol.350 (1), p.1-10
Hauptverfasser: Bergmans, R.H., Brands, A.L.G.P., van der Gon, A.W.Denier, Ceelen, W.C.A.N., Brongersma, H.H., Bielen, P., Creemers, C.
Format: Artikel
Sprache:eng
Schlagworte:
Alkali metals
Applied sciences
Auger electron spectroscopy
Catalysis
Chemisorption
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Heating
Ion-solid interactions, scattering, channeling
Iron
Low energy electron diffraction
Low energy electron diffraction (LEED)
Low energy ion scattering (LEIS)
Low index single crystal surfaces
Metals. Metallurgy
Physics
Potassium
Relaxation processes
Scattering
Solid surfaces and solid-solid interfaces
Surface relaxation and reconstruction
Surface structure
Surface structure and topography
Surface treatment
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:The adsorption of potassium on Fe(100) was studied by time-of-flight forward scattering and recoiling spectroscopy (TOF-SARS), low energy electron diffraction (LEED) and Auger electron spectroscopy (AES). After heating to 650 K of the potassium saturated surface the formation of a p(3 × 3) potassium superstructure was observed by LEED. TOF-SARS experiments ruled out the adsorption of potassium in the on-top, bridge and four-fold hollow site. The only site which is in agreement with all experimental results is the substitutional site where K replaces an Fe atom of the topmost layer of the crystal. This is the first time a substitutional adsorption site has been found on a bcc surface. On an fcc surface such an adsorption site has been found recently for adsorption of sodium and potassium on Al(111).
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(95)01133-1