Quasidynamical LEED intensity analysis in the medium energy range 200–600 eV

Abstract

LEED intensities of the metastable 1 × 1 phases of Ir, Pt and Au(100) have been measured for T ≈ 100 K and normal incidence up to about 600 eV. They are compared to quasidynamical calculations neglecting intralayer scattering. It turns out that all important features of the spectra are reproduced by this approximation, however, with occasional wrong relative intensities of neighboured peaks and small peak shifts. Moreover, it is proved that surface sensitivity is saved in the high energy region when low temperatures are used. The theory-experiment comparison by Zanazzi-Jona r-factors comes out to be comparably good with average values of less than 0.15 for the three surfaces.