Surface step bunching and crystal defects in InAlAs films grown by molecular beam epitaxy on (111)B InP substrates
作者:
N. Be´court,
F. Peiro´,
A. Cornet,
J. R. Morante,
P. Gorostiza,
G. Halkias,
K. Michelakis,
A. Georgakilas,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 20
页码: 2961-2963
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120229
出版商: AIP
数据来源: AIP
摘要:
The surface morphology and crystal structure of InAlAs films grown by molecular beam epitaxy on (111)B InP substrates misoriented 1° toward [2¯11] have been investigated. Combined plane view transmission electron microscopy and atomic force microscopy observations have revealed spectacular terracelike topographies, induced by surface step bunching during the growth. Furthermore, cross section transmission electron microscopy analysis has shown the presence of threading dislocations, related to the giant steps, as well as strain inhomogeneities attributed to composition modulation. We have also demonstrated the potential use of the giant steps for local deposition of InAs. ©1997 American Institute of Physics.
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