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Structural anisotropy of InGaAs/GaAs(001) quantum dot chains structures
Author(s) -
Kladko V. P.,
Slobodian M. V.,
Strelchuk V. V.,
Yefanov O. M.,
Machulin V. F.,
Mazur Yu. I.,
Wang Zh. M.,
Salamo G. J.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200675678
Subject(s) - superlattice , diffraction , quantum dot , planar , anisotropy , perpendicular , condensed matter physics , substrate (aquarium) , quantum well , materials science , gallium arsenide , high resolution , crystallography , physics , chemistry , optics , optoelectronics , geometry , geology , mathematics , laser , oceanography , remote sensing , computer science , computer graphics (images)
We have studied the structural properties of ordered InGaAs/GaAs(001) quantum dot chains multilayer by high‐resolution X‐ray diffraction. Two systems of lateral satellites, one of which being inclined with respect to the sample surface normal, i.e. the growth direction [001], were observed. The measured inclination of 30.0° ± 2.5° does not affect the diffraction profile from planar superlattice (SL), i.e. SL peaks are not inclined with respect to the GaAs substrate peak. We identify the splitting of coherent SL satellites for all orders as well as for two perpendicular directions. This splitting most likely indicates that two discrete periods exist in SL structure. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)