We investigate the Ir(1 1 0)-c(2 4)S adsorbate system using X-ray photoelectron diffraction. As proposed by a previous structure model based on a scanning tunneling microscopy experiment, we find that sulfur atoms of this superstructure enter the second adsorption layer. In contrast to the existing structure model the adatoms do not occupy on-top adsorption sites above first-layer adatoms. We refine the proposed structure model by moving sulfur atoms of the second adsorption layer out of the on-top position. Our experimental results are compared with single and multiple scattering calculations.
Adsorption geometry of sulfur on Ir(1 1 0)-c(2 4)S / J. Kroger; J. Kuntze; A. Atrei; B. Cortigiani; U. Bardi; G. Rovida. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 539:(2003), pp. 537-541. [10.1016/S0039-6028(03)00796-9]
Adsorption geometry of sulfur on Ir(1 1 0)-c(2 4)S
CORTIGIANI, BRUNETTO;BARDI, UGO;ROVIDA, GIANFRANCO
2003
Abstract
We investigate the Ir(1 1 0)-c(2 4)S adsorbate system using X-ray photoelectron diffraction. As proposed by a previous structure model based on a scanning tunneling microscopy experiment, we find that sulfur atoms of this superstructure enter the second adsorption layer. In contrast to the existing structure model the adatoms do not occupy on-top adsorption sites above first-layer adatoms. We refine the proposed structure model by moving sulfur atoms of the second adsorption layer out of the on-top position. Our experimental results are compared with single and multiple scattering calculations.
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