Applied Physics Letters, volume 68, issue 23, pages 3284-3286

Self‐organization processes of InGaAs/GaAs quantum dots grown by metalorganic chemical vapor deposition

Publication typeJournal Article
Publication date1996-06-03
scimago Q1
wos Q2
SJR0.976
CiteScore6.4
Impact factor3.5
ISSN00036951, 10773118
Physics and Astronomy (miscellaneous)
Abstract

In0.5Ga0.5As/GaAs (001) quantum dots (QDs) were grown by metalorganic chemical vapor deposition (MOCVD) on exactly (001) oriented substrates using the Stranski–Krastanow growth mode. The dot density and their relative geometrical arrangement are found to be strongly dependent on the substrate temperature. The dots have identical square shaped bases oriented along 〈100〉. For high densities a preferential relative alignment of the dots along the 〈110〉 directions is found. These dots tend to be arranged in a chainlike pattern with decreasing dot size towards the ends of the chains. From these observations the dot formation process for In0.5Ga0.5As quantum dots is suggested to be driven by energetics whereas the relative orientation is governed by kinetic effects.

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