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Double Periodicity Formation in EuTe/PbTe Superlattices

Published online by Cambridge University Press:  21 February 2011

M. Shima ,
L. Salamanca-Riba ,
G. Springholz  and
G. Bauer
M. Shima
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742.
L. Salamanca-Riba
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742.
G. Springholz
Affiliation:
Institut für Halbleiterphysik, Johannes Kepler Universität, Linz, Austria.
G. Bauer
Affiliation:
Institut für Halbleiterphysik, Johannes Kepler Universität, Linz, Austria.
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Abstract

Molecular beam epitaxy was used to grow EuTe(x)/PbTe(y) short period superlattices with x=1-4 EuTe(111) monolayers alternating with y≈3x PbTe monolayers. The superlattices were characterized by transmission electron microscopy and high resolution x-ray diffraction. Regions with double periodicity were observed coexisting with areas of nominal periodicity. The sample with x=3.5 and y=9, for example, contains regions with double periodicity of x=7 and y=17. X-ray diffraction measurements confirm the formation of the double periodicity in these samples by the appearance of weak satellites in between the satellites of the nominal periodicity. The double periodicity in the superlattice is believed to result from interdiffusion during the growth. A model for this process is presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 399: Symposium D – Evolution of Epitaxial Structure and Morphology , 1995 , 543
Copyright
Copyright © Materials Research Society 1996

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References

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