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“Column-By-Column” Compositional Mapping At Semiconductor Interfaces Using Z-Contrast Stem

Published online by Cambridge University Press:  21 February 2011

D. E. Jesson
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6024
S. J. Pennycook
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6024
J. -M. Baribeau
Affiliation:
Division of Physics, National Research Council of Canada, Ottawa, K1AOR6, Canada
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Abstract

A new strategy for atomic resolution compositional mapping at semiconductor interfaces is presented. Images can be interpreted directly to within 10% to give column-by-column compositional information with a sensitivity approaching Rutherford scattering cross sections. We apply the method to obtain the first atomic resolution images of interfacial ordering in ultrathin (SimGen)p superlattices and attribute the results to growth on (2 × 1) and (1 × 2) reconstructed surfaces.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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