Fast atom diffraction from superstructures on a Fe110 surface.
Fast atoms with energies from 500 eV up to several keV are grazingly scattered from a Fe(110) surface covered with defined superstructures of sulfur or oxygen atoms. For scattering along low index azimuthal directions, we observe defined diffraction patterns in the angular distributions for scattered projectiles. From the analysis of those patterns, we derive the widths of low indexed axial channels and the corrugation of the interaction potential across these channels. This allows us to estimate the positions of adsorbed atoms on the Fe(110) surface. By demonstration, for adsorbate induced superstructures on a metal surface, we show that fast atom diffraction, first observed for insulators, can be applied to studies on surface structures for a wide range of materials.
Schüller
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A
Institut für Physik, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 6, D-12489 Berlin-Adlershof, Germany.
Busch
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M
Wethekam
S
S
Winter
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H