Anisotropic shape of self-assembled InAs quantum dots: Refraction effect on spot shape of reflection high-energy electron diffraction

2001 ◽  
Vol 64 (16) ◽  
Author(s):  
Takashi Hanada ◽  
Bon-Heun Koo ◽  
Hirofumi Totsuka ◽  
Takafumi Yao
Keyword(s):  
Quantum Dots ◽  
Electron Diffraction ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Inas Quantum Dots ◽  
Refraction Effect ◽  
Self Assembled

scholarly journals Structures of self-assembled n-alkanethiols on gold by reflection high-energy electron diffraction

2020 ◽  
Vol 22 (30) ◽  
pp. 17325-17335
Author(s):  
Mithun Ghosh ◽  
Ding-Shyue Yang
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Self Assembled ◽  
Long Chain

The structures of long-chain alkanethiols (C18H37SH) chemisorbed on an Au(111) single crystal were investigated using reflection high-energy electron diffraction (RHEED).

Kinematical Analysis of the Evolution of Reflection High Energy Electron Diffraction Patterns of Quantum Dot Heterostructures: Correlation with Strain and Anisotropy

2006 ◽  
Vol 924 ◽  
Author(s):  
Andrea Feltrin ◽  
Alexandre Freundlich
Keyword(s):  
Quantum Dots ◽  
Electron Diffraction ◽  
Quantum Dot ◽  
Three Dimensional ◽  
High Energy ◽  
Image Features ◽  
Energy Electron ◽  
Clear Correlation ◽  
High Energy Electron ◽  
Strain Anisotropy

ABSTRACTThe strain distributions and of reflection high energy electron diffraction (RHEED) patterns of uncapped pyramidal shape InAs Stranski-Krastanov quantum dots fabricated on GaAs(001) substrate are investigated theoretically. The three dimensional strain anisotropy is computed with an atomistic elasticity approach, using inter-atomic Keating potentials and the strain energy is minimized using the conjugate gradient numerical method. RHEED images are predicted in the framework of the kinematical theory, by taking into account the refraction of the electron beam at the quantum dot/vacuum interface. Clear correlation between RHEED image features and quantum dot structural properties is established. The study stresses the potential of RHEED for future experimental real-time (during growth) detections and deciphering of strain anisotropies in quantum dots.

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