He-diffraction studies of the low-coverage (1×3)-H and the saturation (1×1)-2H phases on Rh(110)

Abstract

He-diffraction investigations for the (1×3)-H and (1×1)-2H phases on Rh(110) are presented. Quantitative intensity calculations yield the respective corrugation functions, from which the adsorbate locations relative to the close-packed Rh rows are derived. Good agreement with the low-energy electron-diffraction (LEED) results is obtained for the (1×1)-2H structure. For the (1×3)-H phase, a structural model is proposed that differs from the one derived on the basis of LEED, especially with regard to the adsorbate-induced substrate reconstruction.