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X-ray diffraction and transmission electron microscopy analysis of ordering and structure in Al1−xInxAs thin films

Published online by Cambridge University Press:  31 January 2011

R. L. Forrest ,
J. Kulik ,
T. D. Golding  and
S. C. Moss
R. L. Forrest
Affiliation:
Physics Department, University of Houston, Houston, Texas 77204-5506
J. Kulik
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5932
T. D. Golding
Affiliation:
Physics Department, University of Houston, Houston, Texas 77204-5506
S. C. Moss
Affiliation:
Physics Department, University of Houston, Houston, Texas 77204-5506
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This paper presents an x-ray diffraction and transmission electron microscopy analysis of Al1−xInxAs grown by molecular beam epitaxy. Two samples grown on (001) InP at temperatures of 370 and 400 °C are characterized. The first, which contains a high density of twin lamellae, exhibits triple-period short-range ordering with a rather short correlation range normal to the (111) planes. Within these (individual) planes, the concentration, however, is uniform over a considerably greater distance, leading to a highly anisotropic scattering. This is the first observation of triple-period short-range ordering in a sample that exhibits 2 × 1 surface reconstruction. The second sample exhibits CuPt-type short-range ordering with scattering that is significantly streaked, suggestive of lamellar-shaped ordered domains. Both samples contain high densities of stacking faults leading to additional sharp streaking along symmetry-allowed 〈111〉 directions.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 1 , January 2000 , pp. 45 - 55
Copyright
Copyright © Materials Research Society 2000

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