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TEM image contrast from antiphase domains in GaAs: Ge(001) grown by MBE

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Abstract

Antiphase domains occur in thin GaAs epitaxial films grown on Ge(001) by molecular beam epitaxy. The domains have been imaged by transmission electron microscopy using 200-type reflections in dark field. The carefully chosen imaging conditions with convergent illumination ensure that doubly diffracted beams from a pair of first order Laue zone discs contribute to the singly diffracted 200-type beams. The three Bragg reflections may add in or out of phase to give domains in either light or dark contrast depending on their polarity.

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  1. Philips Research Laboratories, RH1 5HA, Redhill, Surrey, England

    J. P. Gowers

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Gowers, J.P. TEM image contrast from antiphase domains in GaAs: Ge(001) grown by MBE. Appl. Phys. A 34, 231–236 (1984). https://doi.org/10.1007/BF00616577

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