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Scanning transmission electron microscopy of ErAs nanoparticles embedded in epitaxial In0.53Ga0.47As layers

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4 Author(s)
Klenov, Dmitri O. ; Materials Department, University of California, Santa Barbara, California 93106-5050 ; Driscoll, Daniel C. ; Gossard, A.C. ; Stemmer, Susanne

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We use high-angle annular dark-field imaging in scanning transmission electron microscopy to investigate the crystal structure and particle morphology of semimetallic ErAs nanoparticles embedded in epitaxial In0.53Ga0.47As layers. Deposition of increasing amounts of Er results in a higher density of particles and particles coalescence for high amounts. Despite overlap with the matrix through the thickness of the sample used for transmission electron microscopy, the crystal structure of ErAs particles is unambiguously identified as rock salt. The As sublattice is continuous across the interface between the particle and the zinc-blende semiconductor.

Published in:

Applied Physics Letters  (Volume:86 ,  Issue: 11 )

Date of Publication:

Mar 2005

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