Results 211 to 220 of about 170,590 (263)

Low-Energy Electron Diffraction

1986
Abstract Low-energy electron diffraction (LEED) is a technique for investigating the crystallography of surfaces and overlayers adsorbed on surfaces. This article describes the principles of diffraction from surfaces, and elucidates the method of sample preparation to achieve diffraction patterns. The article describes the limitations of
Michel A. Van Hove, William H. Weinberg, Chi-Ming Chan   +2 more
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Low-energy electron diffraction

Contemporary Physics, 1973
Abstract This paper provides a brief introduction to the theory and practice of low-energy electron diffraction, a tcchnique which is proving useful for investigating the structure of surfaces. Emphasis is given to clean well-defined surfaces which are studied also with Auger electron spectroscopy and under conditions of ultra-high vacuum. Knowledge of
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Low-Energy Electron Diffraction ☆

2018
Low-energy electron diffraction (LEED) [1] is one of the diffraction techniques utilizing low-energy electrons and a powerful method for surface structural analysis.
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Low-energy electron diffraction

International Materials Reviews, 1971
AbstractMany investigations in metallurgy and physics require a knowledge of the chemical and physical state of the surface of a solid. For example, junction effects at semiconductor interfaces depend sensitively upon the surface states, which, in turn, depend upon the surface symmetry and chemistry; rigorous studies of epitaxial overgrowth must ...
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Low-energy electron diffraction amplitudes

Surface Science, 1972
Abstract The reflection (Bragg) case of the dynamical theory of diffraction is analyzed with a view to applications in low-energy electron diffraction. A theoretical description of diffraction amplitudes is developed for a model consisting of a substrate crystal periodic in three dimensions, with a two-dimensionally periodic selvedge (surface region).
J.I. Gersten, E.G. McRae
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Systematic Absences in Low Energy Electron Diffraction

Physica Status Solidi (a), 1978
The “cluster-embedded chain”-method is applied to calculate extinction rules valid for sharp and diffuse LEED-reflections in ordered and disordered crystal surfaces. Besides the wellknown absences due to glide planes with a translational component parallel to the surface, there are others due to translations vertical to it.
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Low Energy Electron Diffraction

1992
One of the most powerful techniques available for surface structural analysis is low energy electron diffraction (LEED). It is widely used in materials science research to study surface structure and bonding and the effects of structure on surface processes.
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Diffuse low-energy electron diffraction

Progress in Surface Science, 1996
Abstract Up to the mid-1980′s low energy electron diffraction (LEED) was considered as a surface structural tool applying only to surfaces with long-range order and exhibiting sharp diffraction patterns. It was then pointed out first by theoretical work that long-range order is not really essential: diffuse LEED (DLEED) intensities, particularly ...
U. Starke, J.B. Pendry, K. Heinz
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Low-Energy Electron Diffraction

1990
The essential elements are an ultrahigh vacuum (UHV) chamber to preserve surface cleanliness, an electron gun to produce a collimated beam of electrons in the energy range 0 to 500 eV, a crystal holder and manipulator, and some means of observing the diffracted electrons, typically a fluorescent screen.
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Low-energy electron diffraction

Physics Today, 1964
Electron diffraction has become established as a research tool for studying the structure of surface layers and thin films, and it has now been used moderately extensively for this purpose for more than a third of a century. Yet its field of usefulness is not sharply separated from that of x rays. Both require material of considerable thickness.
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