Diffuse LEED intensities of disordered crystal surfaces
نویسندگان
چکیده
منابع مشابه
DIFFUSE LEED INTENSITIES OF DISORDERED CRYSTAL SURFACES II. Multiple scattering on disordered overlayers
The diffraction of low energy electrons from disordered overlayers adsorbed on ordered substrates is treated theoretically by an extension of Beeby’s multiple scattering method. A lattice gas model is assumed for the disordered adsorbate layer. Multiple scattering within a certain area around each atom each atom of the overlayer and within the ordered substrate is treated self-consistently, the...
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The LEED pattern of clean (101) surfaces of Au show a characteristic (1 X 2) superstructure. The diffuseness of reflections in the reciprocal [OlO] direction is caused by onedimensional disorder of chains, strictly ordered into spatial [lo]] direction. There is a transition from this disordered superstructure to the normal (1 X 1) structure at 420 r 15°C. The angular profiles of the (04) and (0...
متن کاملDIFFUSE LEED INTENSITIES OF DISORDERED CRYSTAL SURFACES I. Correlations between statistics and multiple diffraction
It is shown that the diffraction of slow electrons from disordered crystal surfaces is correlated with the problem of thermodynamical statistics. The correlation functions are completely determined by the self-energies and interaction energies of neighboring complexes. These quantities solve the problem of a-priori probabilities and the cooperative phenomenon of correlation functions of these c...
متن کاملLimitations of LEED-Structure Determination of Reconstructed Crystal Surfaces
für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...
متن کاملEffective calculation of LEED intensities using symmetry - adapted functions
The calculation of LEED intensities in a spherical-wave representation can be substantially simplified by symmetry relations. The wave field around each atom is expanded in symmetry-adapted functions where the local point symmetry of the atomic site applies. For overlayer systems with more than one atom per unit cell symmetry-adapted functions can be used when the division of the crystal into m...
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ژورنال
عنوان ژورنال: Surface Science
سال: 1978
ISSN: 0039-6028
DOI: 10.1016/0039-6028(78)90005-5