New method for the analysis of reflection high-energy electron diffraction:α−Sn(001)and InSb(001) surfaces

1983 ◽  
Vol 27 (8) ◽  
pp. 4961-4965 ◽  
Author(s):  
I. Hernández-Calderón ◽  
H. Höchst
Keyword(s):  
High Energy ◽  
Energy Electron ◽  
New Method ◽  
High Energy Electron

scholarly journals Three-Dimensional High-Energy Electron Radiography Method for Static Mesoscale Samples Diagnostics

2019 ◽  
Vol 9 (18) ◽  
pp. 3764
Author(s):  
Quantang Zhao ◽  
Yuanyuan Ma ◽  
Jiahao Xiao ◽  
Shuchun Cao ◽  
Xiaokang Shen ◽  
...  
Keyword(s):  
Three Dimensional ◽  
High Energy ◽  
Energy Electron ◽  
New Method ◽  
Reconstruction Method ◽  
High Energy Electron ◽  
Spherical Sample ◽  
Internal Structures ◽  
Dimensional Reconstruction ◽  
Application Potential

In this paper, we propose a new method for static mesoscale sample diagnosis using three-dimensional radiography with high-energy electron radiography (HEER). The principle of three-dimensional high-energy electron radiography (TDHEER) is elucidated, and the feasibility of this method is confirmed by start-to-end simulation results. TDHEER is realized by combining HEER with the three-dimensional reconstruction method, by which more information about the samples can be attained, especially regarding the samples’ internal structures. With our study, the internal structures and the three-dimensional positions of the spherical sample are determined with a ~3 μm resolution. We believe that this new method enhances the HEER diagnostic capability and extends its application potential in mesoscale sciences.

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.

Sign in / Sign up

Export Citation Format

Share Document