A new method for determining the structure of open surfaces is described and applied to the (1 × 2)-Rh(110) surface. Measurements of helium diffraction and specular reflectivity are analysed by close-coupling calculations, using a model potential given by the superposition of pseudo-pairwise terms. The measurements show that the (1 × 2)-Rh(110) surface has a missing row structure with a relaxation of the first interlayer spacing of 21%. The electronic charge of the topmost atoms as seen by He is about 7% lower for the (1× 2) structure than for the unreconstructed one.
Quantitative structure determination of (1 × 2)-Rh(110) by helium scattering / A., Bellman; Morgante, Alberto; M., Polli; Tommasini, Fernando; D., Cvetko; V. R., Dhanak; A., Lausi; K. C., Prince; R., Rosei. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 298:(1993), pp. 1-5. [10.1016/0039-6028(93)90074-T]
Quantitative structure determination of (1 × 2)-Rh(110) by helium scattering
MORGANTE, ALBERTO;TOMMASINI, FERNANDO;
1993-01-01
Abstract
A new method for determining the structure of open surfaces is described and applied to the (1 × 2)-Rh(110) surface. Measurements of helium diffraction and specular reflectivity are analysed by close-coupling calculations, using a model potential given by the superposition of pseudo-pairwise terms. The measurements show that the (1 × 2)-Rh(110) surface has a missing row structure with a relaxation of the first interlayer spacing of 21%. The electronic charge of the topmost atoms as seen by He is about 7% lower for the (1× 2) structure than for the unreconstructed one.Pubblicazioni consigliate
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