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Structure of 60° dislocations at the GaAs/Si interface

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High‐resolution electron microscopy technique has been applied to a detailed study of the 60° dislocations at the atomic layer molecular‐beam‐epitaxial GaAs/Si interface. Their deformation fields strongly interact with neighbor dislocations inducing irregular spacing between the cores and possible dissociations. Biatomic silicon steps were observed at the interface, but never inside 60° dislocation cores. Computer image simulation and elasticity calculations of the atomic displacement field have been used in order to determine the structure of the 60° dislocation; however, due to the Eshelby effect and to interaction with some neighbor dislocations, in many cases no theoreticalmodel could explain some observations.

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VILÀ I ARBONÈS, Anna maria, CORNET I CALVERAS, Albert, MORANTE I LLEONART, Joan ramon, RUTERANA, Pierre, LOUBRADOU, Marc, BONNET, Roland. Structure of 60° dislocations at the GaAs/Si interface. _Journal of Applied Physics_. 1996. Vol. 79, núm. 2, pàgs. 676-681. [consulta: 26 de gener de 2026]. ISSN: 0021-8979. [Disponible a: https://hdl.handle.net/2445/24745]

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