Phonon scattering in reflection high-energy electron diffraction: Multiple-scattering theory and experiment

1997 ◽  
Vol 56 (23) ◽  
pp. 15320-15331 ◽  
Author(s):  
U. Korte
Keyword(s):  
Electron Diffraction ◽  
Multiple Scattering ◽  
Scattering Theory ◽  
Phonon Scattering ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Multiple Scattering Theory ◽  
Diffraction Multiple ◽  
Theory And Experiment

INTERPRETATION OF REFLECTION HIGH ENERGY ELECTRON DIFFRACTION FROM DISORDERED SURFACES: DYNAMICAL THEORY AND ITS APPLICATION TO THE EXPERIMENT

1999 ◽  
Vol 06 (03n04) ◽  
pp. 461-495 ◽  
Author(s):  
UWE KORTE
Keyword(s):  
Electron Diffraction ◽  
Multiple Scattering ◽  
Surface Science ◽  
Phonon Scattering ◽  
High Energy ◽  
Dynamical Theory ◽  
Energy Electron ◽  
Advanced Materials ◽  
Quantitative Interpretation ◽  
High Energy Electron

Reflection high energy electron diffraction (RHEED) is one of the few surface science techniques that are applied in a fabrication process, namely to monitor the epitaxial growth of ultrathin films and advanced materials. In spite of this technological relevance the multiple scattering nature of the involved scattering processes has hindered the quantitative interpretation of RHEED in the case of real, i.e. imperfect, surfaces for a long time. This article reviews recent progress in the understanding of RHEED from surfaces exhibiting various types of disorder. It concentrates on a multiple scattering formalism — based on perturbation theory with the nonperiodic part of the structure as perturbation — that allows the computation and interpretation of RHEED from real systems. The validity regime of the approach is discussed. We demonstrate the potential of the method by its application to the quantitative interpretation of experimental data. The range of treated problems comprises occupational disorder, intensity oscillations, structure of disordered metal/adsorbate systems, diffuse scattering from adatoms, Kikuchi scattering and phonon scattering.

High-energy electron diffraction on Cu(111) measured with low-energy Auger electrons: theory and experiment

1994 ◽  
Vol 306 (1-2) ◽  
pp. 21-28 ◽  
Author(s):  
A. Stuck ◽  
M. Nowicki ◽  
S. Mroz ◽  
D. Naumovic ◽  
J. Osterwalder
Keyword(s):  
Electron Diffraction ◽  
High Energy ◽  
Low Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Auger Electrons ◽  
Theory And Experiment

Multiple scattering analysis of reflection high-energy electron diffraction intensities from GaAs(110)

1988 ◽  
Vol 128 (8) ◽  
pp. 447-450 ◽  
Author(s):  
S.Y. Tong ◽  
T.C. Zhao ◽  
H.C. Poon ◽  
K.D. Jamison ◽  
D.N. Zhou ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Multiple Scattering ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron

DYNAMICAL EFFECTS IN REFLECTION HIGH-ENERGY ELECTRON DIFFRACTION INTENSITY OSCILLATIONS

1994 ◽  
Vol 01 (02n03) ◽  
pp. 253-260
Author(s):  
T.C. ZHAO ◽  
A. IGNATIEV ◽  
S.Y. Tong
Keyword(s):  
Electron Diffraction ◽  
Multiple Scattering ◽  
Scattering Theory ◽  
High Energy ◽  
High Energy Electron ◽  
Diffraction Intensity ◽  
Mbe Growth ◽  
Simple Interpretation ◽  
Periodic Arrays ◽  
Scattering Geometry

Intensity oscillations during MBE growth are simulated by periodic arrays of steps using dynamical multiple scattering theory of RHEED. Our results show that the oscillations depend strongly upon the scattering geometry. Phase effects, double periodicity, etc. observed in experiments can be explained within the framework of dynamical scattering. Conditions for which a simple interpretation of the oscillations can be made are also discussed.

Kinematic Approximations in TED and RHEED Analysis of Reconstructed Surfaces

1990 ◽  
Vol 48 (2) ◽  
pp. 396-397
Author(s):  
L. -M. Peng ◽  
M. J. Whelan
Keyword(s):  
Electron Diffraction ◽  
Kinematic Analysis ◽  
Incident Beam ◽  
High Energy ◽  
Energy Electron ◽  
Great Success ◽  
High Energy Electron ◽  
Kinematic Approximation ◽  
Reconstructed Surfaces

In recent years there has been a trend in the structure determination of reconstructed surfaces to use high energy electron diffraction techniques, and to employ a kinematic approximation in analyzing the intensities of surface superlattice reflections. Experimentally this is motivated by the great success of the determination of the dimer adatom stacking fault (DAS) structure of the Si(111) 7 × 7 reconstructed surface.While in the case of transmission electron diffraction (TED) the validity of the kinematic approximation has been examined by using multislice calculations for Si and certain incident beam directions, far less has been done in the reflection high energy electron diffraction (RHEED) case. In this paper we aim to provide a thorough Bloch wave analysis of the various diffraction processes involved, and to set criteria on the validity for the kinematic analysis of the intensities of the surface superlattice reflections.The validity of the kinematic analysis, being common to both the TED and RHEED case, relies primarily on two underlying observations, namely (l)the surface superlattice scattering in the selvedge is kinematically dominating, and (2)the superlattice diffracted beams are uncoupled from the fundamental diffracted beams within the bulk.

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