Change in adsorption bond length with coverage for K/Al(111)

The local bond geometry of potassium adsorbed on Al(111) at low temperature has been studied by photoelectron diffraction (PED) as a function of K coverage. It is found that K atoms occupy on-top sites in the coverage range 0.05-0.4 monolayer and that the K-Al bond length increases by 0.17 A over th...

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Veröffentlicht in:	Surface science 1995-10, Vol.339 (3), p.L919-L924
Hauptverfasser:	CHRISTENSEN, S. V, NIELSEN, K. T, NERLOV, J, BATCHELOR, D. R, ADAMS, D. L
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Metals. Metallurgy Physics Solid surfaces and solid-solid interfaces Surface structure and topography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	The local bond geometry of potassium adsorbed on Al(111) at low temperature has been studied by photoelectron diffraction (PED) as a function of K coverage. It is found that K atoms occupy on-top sites in the coverage range 0.05-0.4 monolayer and that the K-Al bond length increases by 0.17 A over this coverage range. The reliability of this result is supported by PED studies of the (root 3xroot 3)R30 deg structures formed by adsorption of one-third monolayer sodium and K at 300K, and K at 150K, which give results in quantitative agreement with previous structure determination by SEXAFS and LEED.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/0039-6028(95)80058-1