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Plastic Relaxation Mechanics in Systems with a Twist-Bonded Layer

Published online by Cambridge University Press:  11 February 2011

Catherine Priester  and
Geneviève Grenet
Catherine Priester
Affiliation:
IEMN/ISEN, CNRS-UMR 8520, BP 69 F-59625, Villeneuve d'Ascq Cedex, FRANCE.
Geneviève Grenet
Affiliation:
ECL/LEOM, CNRS-UMR 5512, BP 163 F-69131, Ecully, Cedex, FRANCE
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Abstract

With a view to investigating how a thin film twist-bonded to a host substrate can have compliant behavior from a plasticity point of view, the onset and spread of edge dislocations throughout a mesa are studied. The discussion focuses on the energy relaxed by such dislocations in a mesa made from two coherently bonded lattice-mismatched layers twist-bonded onto a host substrate and patterned down to the film/host substrate interface. Our theoretical results show that the confinement of threading dislocations into a thin twist-bonded film is energetically favorable allowing the overgrowth of a mismatched layer exempt of any threading dislocation at least as far as mesas are concerned.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 740: Symposium I – Nanomaterials for Structural Applications , 2002 , I13.4
Copyright
Copyright © Materials Research Society 2003

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References

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