Dynamical Calculations of Low Energy Electron Diffraction for Deposited Iron Films
نویسندگان
چکیده
منابع مشابه
Theory of Low-Energy Electron Diffraction
A method for calculating the intensities of diffracted waves in low energy electron diffraction by crystals is proposed. The elastic multiple scattering is fully taken into account. The cellular method of KOHN and ROSTOKER in the band theory of metals is applied to the integral equation of the scattering by two dimensional lattices, particularly by monatomic layers. The solution is expanded in ...
متن کاملDynamical low-energy electron-diffraction investigation of lateral displacements in the topmost layer of Pd(110).
Based on He-atom diffraction evidence for an order-disorder transition on Pd(110) at 230 K, other authors have proposed a model in which the atoms of the topmost layer are displaced laterally by 0.7 Å along the [001] direction, with the directions of the displacements correlated at T<230 >K, but largely uncorrelated at T>230 K. To test this model, we have examined the proposed ordered phase by ...
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sind die als WELKERsche Regel bekannt gewordenen Gesetzmäßigkeiten 13 und der von Gutbier gefundene Zusammenhang zwischen der Breite der verbotenen Zone und dem partiellen Ionencharakter der Bin dung bei Tetraederstruktur 14. Bei unregelmäßiger Anordnung von gleichen Atomen, wie z. B. in ato maren Schmelzen, trifft die linke Hälfte der Abb. 1 zu, in der keine Energielücke vorhanden ist. Daher...
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A theory of low-energy electron dif fraction (LEED) amplitudes is developed for a model in which the crystal surface is represented by a step-function termination of the bulk crystal potential ("bare-substrate" mode l ) . The crystal is considered to be centro-symmetric and it is assumed that either the crystal has a two-fold axis of rotation normal to the surface or the primay beam is normally...
متن کاملA Low Energy Electron Diffraction Study of Surface Structures
From the low-energy electron diffraction (LEED) analysis of the (110) surface of palladium we have determined an oscillatory relaxation with respect to the bulk interlayer spacing in the two topmost layers. We used R-factors for quantitative comparison of theoretical I-V curves with the experimental data. The oscillatory relaxation of the surface Pd(110) d12 = (1.33 ± 0.05) Å, d23 = (1.44 ± 0.0...
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ژورنال
عنوان ژورنال: SHINKU
سال: 1982
ISSN: 0559-8516,1880-9413
DOI: 10.3131/jvsj.25.315