CHANGE IN ADSORPTION BOND-LENGTH WITH COVERAGE FOR K/AL(111)

被引:7
作者
CHRISTENSEN, SV
NIELSEN, KT
NERLOV, J
BATCHELOR, DR
ADAMS, DL
机构
[1] AARHUS UNIV, INST PHYS & ASTRON, DK-8000 AARHUS C, DENMARK
[2] UNIV COPENHAGEN, DEPT CHEM, DK-2100 COPENHAGEN O, DENMARK
关键词
ALKALI METALS; PHOTOELECTRON DIFFRACTION; SURFACE RELAXATION AND RECONSTRUCTION;
D O I
10.1016/0039-6028(95)80058-1
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The local bond geometry of K 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-AI bond length increases by 0.17 Angstrom over this coverage range. The reliability of this result is supported by FED studies of the (root 3 x root 3)R30 degrees structures formed by adsorption of one-third monolayer Na and K at 300 K, and K at 150 K, which give results in quantitative agreement with previous structure determinations by SEXAFS and LEED.
引用
收藏
页码:L919 / L924
页数:6
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