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Strain Relaxation During Solid-Phase Epitaxial Crystallisation Of GexSi1−x Alloy Layers with Depth Dependent Ge Compositions
Published online by Cambridge University Press: 15 February 2011
Abstract
Solid-phase epitaxial growth (SPEG) of amorphous GeSi alloy layers has been examined. It is shown that fully strained depth dependent GeSi alloy layers can be produced by multiple ion-implantation and SPEG for implant doses below critical values. For doses above these critical values strain relaxation is shown to occur during SPEG at a well defined depth, and to be correlated with a reduction in the SPEG velocity caused by roughening or faceting of the crystalline/amorphous interface. The velocity reduction is shown to be a reliable indicator of strain relaxation. Both the critical dose and the depth at which strain relaxation occurs are shown to be in excellent agreement with equilibrium critical thickness theory.
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- Copyright © Materials Research Society 1994
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