Title
Size effects and strain state of <tex>$Ga_{1-x}In_{x}As/GaAs$</tex> multiple quantum wells: Monte Carlo study Size effects and strain state of <tex>$Ga_{1-x}In_{x}As/GaAs$</tex> multiple quantum wells: Monte Carlo study
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Volume/pages
78(2008) :16 , p. 165326,1-165326,7
ISSN
0556-2805
ISI
000260574500084
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The effect of the size of the GaAs barrier and the Ga1−xInxAs well on the structural properties of a Ga1−xInxAs/GaAs multiple quantum well structure is investigated using the Metropolis Monte Carlo approach based on a well-parametrized Tersoff potential. It is found that within the well the Ga-As and In-As bond lengths undergo contractions whose magnitude increases with increasing In content in sharp contrast with bond-length variations in the bulk Ga1−xInxAs systems. For fixed barrier size and In content, the contraction of the bonds is also found to increase with increasing size of the well. Using the local atomic structure of the heterostructures, a more local analysis of the strain state of the systems is given and comparison with the prediction of macroscopic continuum elasticity theory shows deviations from the latter.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/5ace05/8d54f705.pdf
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