Results 151 to 160 of about 472,957 (203)

Holographic low-energy electron diffraction

Journal of Physics: Condensed Matter, 2001
A method for imaging of the atomic environment of the surface of a sample, characterized by the steps of: directing a beam against the surface to form an interference pattern; detecting the intensity distribution of the pattern; calculating numerical image intensity data corresponding to the intensity distribution; and reconstructing the data to form ...
K Heinz, A Seubert, D K Saldin
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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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Quasikinematic low-energy electron-diffraction surface crystallography

Physical Review B, 1993
Based on the idea of constant-momentum-transfer averaging (CMTA) of Lagally et al. and facing the problem of CMTA pointed out by Pendry, in the present work we propose the use of the quasikinematic low-energy electron-diffraction (QKLEED) calculations in comparison with the experimental CMTA curves in surface structure determinations.
, Jia, , Zhao, , Yang
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Low energy scanning electron microscopy combined with low energy electron diffraction

Surface Science Letters, 1986
Abstract An ultra-high-vacuum (UHV) scanning-electron microscope (SEM) with a field-emission gun (FEG) is operated in a low energy region from 100 eV to 3 keV. The functions of scanning low energy electron diffraction microscopy and scanning Auger microscopy have been implemented and their performance is demonstrated.
T. Ichinokawa, Y. Ishikawa, M. Kemmochi, N. Ikeda, Y. Hosokawa, J. Kirschner   +5 more
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Low-energy electron diffraction with energy resolution

Review of Scientific Instruments, 1992
Low-energy electron diffraction (LEED) is a well established technique for evaluation of the surface atom arrangement. The information is derived from the elastically scattered electrons. Usually the thermal diffuse background between diffraction spots is assumed to be constant and subtracted as a constant. For spot profile analysis, which provides the
H. Claus, A. Büssenschütt, M. Henzler
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Dynamical low energy electron diffraction methods

Journal of Physics C: Solid State Physics, 1975
The authors present and discuss theoretical techniques that considerably increase the power of dynamical leed calculations, particularly in the layer treatment of surfaces. Their wide applicability makes them especially suitable for surface structural determination.
M A Van Hove, J B Pendry
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Pump-probe low-energy electron diffraction

SPIE Proceedings, 1995
We present a time-resolved pump-probe low energy electron diffraction experiment to study the dynamics of surface phase transitions. An ultrashort laser pulse heats a surface on a picosecond time scale, and a time-delayed, photogenerated electron pulse probes the resultant surface dynamics by diffraction.
John R. Thompson, Peter M. Weber, Peder J. Estrup   +2 more
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Tensor low-energy electron diffraction

Journal of Physics: Condensed Matter, 1994
The tensor low-energy electron diffraction (LEED) approximation is a perturbative approach to the calculation of LEED I-V spectra. This article reviews the theory, applications and impact of the tensor LEED approximation upon surface crystallography by LEED.
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Low-Energy Electron Diffraction

1981
Low-energy electron diffraction (LEED) is the most widely applied technique for investigating the surface structure of solids. After a brief discussion of the nomenclature used in surface crystallography, the fundamental aspects of LEED and its main results are described.
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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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