NDLI: Spontaneous lateral composition modulation in AlAs/InAs short period superlattices via the growth front

Content Provider	Springer Nature Link
Author	Millunchick, J. Mirecki Twesten, R. D. Lee, S. R Follstaedt, D. M. Jones, E. D. Ahrenkiel, S. P. Zhang, Y. Cheong, H. M. Mascarenhas, A.
Copyright Year	1997
Abstract	The spontaneous formation of lateral composition modulation in AlAs/lnAs short period superlattices on InP (001) substrates has been investigated. Transmission electron microscopy and x-ray diffraction reciprocal space mapping show that the lateral modulation is very regular, with a periodicity along the [110] direction on the order of 180Å. A surprising: result is that this material system also exhibits a lateral modulation along the [1–10] direction, with a periodicity of 330Å. Reflection high energy electron diffraction performed during the deposition revealed that the reconstruction changed from (2 × 1) during the InAs deposition cycle to (1 × 2) during the AlAs cycle, which may be related to the presence of the modulation in both <110> directions. High magnification transmission electron micrographs show that the surface is undulated and that these undulations correlate spatially with composition modulation. Detailed analysis of the images shows that the contrast observed is indeed due to composition modulation. Photoluminescence from the modulated layer is strongly polarized and red-shifted by 220 meV.
Starting Page	1048
Ending Page	1052
Page Count	5
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	26
Issue Number	9
e-ISSN	1543186X
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Composition modulation lateral modulation superlattices Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics and Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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