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Phys. Rev. Lett. 66, 2629–2632 (1991)

Rigid-body translation and bonding across {110} antiphase boundaries in GaAs

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D. René Rasmussen, Stuart McKernan, and C. Barry Carter
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853

Received 19 October 1990; published in the issue dated 20 May 1991

A transmission-electron-microscope strong-beam technique is used to investigate the rigid-body translation across {110} antiphase boundaries in GaAs. The results show a translation in the 〈001〉 direction parallel to the plane of the boundary. The magnitude of the translation is determined, and the antisite bond lengths are discussed in terms of the tetrahedral radii of Ga and As. Given this knowledge of the rigid-body translation, the absolute polarity of a GaAs grain can be determined immediately from a bright-field image of the {110} antiphase boundary.

© 1991 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.66.2629
DOI:
10.1103/PhysRevLett.66.2629
PACS:
61.16.Di