Author
Stephan Reindl
Bio: Stephan Reindl is an academic researcher. The author has contributed to research in topics: Chemisorption & Hubbard model. The author has an hindex of 2, co-authored 3 publications receiving 23 citations.
Topics: Chemisorption, Hubbard model, Tight binding, Surface layer, Overlayer
Papers
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TL;DR: In this paper, the adsorbate induced clock-reconstruction of the Ni(100) surface has been studied and it is shown that the reconstruction is accompanied by a large outward relaxation of the atoms of the surface layer and a second surface layer corrugation.
15 citations
TL;DR: In this article, the coverage dependence of the structural order of O chemisorbed on the Ni(100) surface both in the case of a pure oxygen adlayer and in the presence of a cationic coadsorbate was investigated.
7 citations
TL;DR: In this article, the position and chemisorption energy of O on Ni(100) as a function of coverage and including atomic relaxations were studied. But the results do not indicate the pseudo-bridge position as a stable one.
Abstract: We study the position and chemisorption energy of O on Ni(100) as a function of coverage and including atomic relaxations. A Hubbard like tight-binding Hamiltonian and the Hartree-Fock approximation is used. The repulsive interaction between atoms is described by a Born-Mayer type potential. Results are given for atomic relaxations and for the binding energy of O at various chemisorption sites. Our results do not indicate the pseudo-bridge position as a stable one.
1 citations
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Journal Article•
TL;DR: The initial stages of the interaction of oxygen gas with a clean Ni surface have been studied by a combination of LEED, AES, work function change and ion bombardment sectioning techniques as discussed by the authors.
387 citations
116 citations
TL;DR: In this paper, the adsorption system of c (2 × 2) O Ni (100) was investigated by a detailed LEED analysis and the best fit results were for a fourfold symmetric hollow adsorment site whereby off center displacements larger than 0.2 A can be ruled out.
83 citations
TL;DR: There is also evidence that the adsorption structure on the unreconstructed orientation surface may have a particularly low surface free energy as discussed by the authors, and this type of reconstruction appears to offer an atomistic alternative to the more microscopic phenomenon of adsorbate-induced faceting.
Abstract: There is increasing evidence that there exists a class of adsorbate-induced reconstructions of metal surfaces in which the outermost substrate layer (or layers) and the adsorbed species adopt an almost identical geometry on surfaces of several different orientations of the same substrate; on one orientation this involves little or no substrate distortion, but on the others, major reconstruction is required. There is also evidence that the adsorption structure on the unreconstructed orientation surface may have a particularly low surface free energy. This type of reconstruction therefore appears to offer an atomistic alternative to the more microscopic phenomenon of adsorbate-induced faceting. By reviewing the existing structural information concerning the adsorbate structures of S on Ni, Cu and Pt, C and N on Ni and Cu and O on Cu, the evidence for this idea, and for some complementary patterns of adsorbate-induced reconstruction, are discussed. These data on the long-range-ordered phases on the (100), (111) and (110) faces of these materials are compared with the limited data available on the influence of the adsorbates on the anisotropy of the surface free energy, or gamma -plot.
72 citations
TL;DR: In this paper, a detailed LEED analysis of the p(2 × 2)O/Ni(100) phase was conducted, whereby the purity of the 2 × 2 phase was controlled by HREELS.
49 citations