TITLE

Shape and growth of InAs quantum dots on GaAs(113)A

AUTHOR(S)
Temko, Y.; Suzuki, T.; Jacobi, K.
PUB. DATE
March 2003
SOURCE
Applied Physics Letters;3/31/2003, Vol. 82 Issue 13, p2142
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The shape of InAs quantum dots (QDs), grown by molecular-beam epitaxy on the GaAs(113)A surface, is studied by in situ scanning tunneling microscopy. At an early growth stage, the QDs adopt a shape given by {110}, (111)A, and {2 5 11}A bounding facets and an unresolved rounded {001} region. At a later growth stage, the QDs become elongated along [332], with a reduction of the (111)A facet size and a flattening of the rounded region. This is explained by facet growth kinetics. The broad size distribution indicates growth limitation. The symmetry of the substrate is retained in the QDs, proving epitaxial growth.
ACCESSION #
9377408

 

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