Abstract
(√3 × √3)-R30° Xe layers on Pt(111) were studied by spin-polarized LEED. Spin-polarized photoelectrons from a GaAs source were diffracted and the spin-dependent intensities of the adsorbate-induced beams were measured. Different adsorbate-induced beams not equivalent by symmetry in the system Xe-Pt(111) but equivalent in an isolated Xe layer show identical spin-dependent scattering asymmetries indicating a diminishing interlayer scattering and thus a diminishing influence of the substrate. Thus the adsorbate-induced beams are not suitable for structure determination. Spin-dependent scattering asymmetries measured in spin-polarized LEED of adsorbed Xe show a structure similar to one in asymmetry profiles of free Xe known in the literature.
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