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What does an (a+c) dislocation core look like in wurtzite GaN ?

Published online by Cambridge University Press:  01 February 2011

Imad Belabbas ,
Gerard Nouet ,
A. Béré ,
J. Chen ,
S. Petit ,
M.A. Belkhir ,
P. Ruterana  and
Ph. Komninou
Imad Belabbas
Affiliation:
[email protected], ENSICAEN, SIFCOM, ENSICAEN/SIFCOM, 6 boulevard du marechal juin, Caen, Caen, N/A, 14050, France, 33.(0)2.31.45.25.54, 33.(0)2.31.45.26.60
Gerard Nouet
Affiliation:
[email protected], ENSICAEN, SIFCOM, France
A. Béré
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, Ecole Nationale Supérieure d‘Ingénieurs de Caen, 6 Bld du Maréchal Juin, 14050 Caen cedex, France
J. Chen
Affiliation:
Laboratoire de Physique et de Chimie de l’Environnement, Université de Ouagadougou, 03 BP: 7021 Ouagadougou 03, Burkina Faso
S. Petit
Affiliation:
Laboratoire de Recherche sur les Propriétés des Matériaux Nouveaux, Institut Universitaire de Technologie d'Alençon, 61250 Damigny, France
M.A. Belkhir
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, Ecole Nationale Supérieure d‘Ingénieurs de Caen, 6 Bld du Maréchal Juin, 14050 Caen cedex, France
P. Ruterana
Affiliation:
Groupe de Physique du Solide, Laboratoire de Physique Théorique, Université A.Mira, Béjaia, Algérie
Ph. Komninou
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, Ecole Nationale Supérieure d‘Ingénieurs de Caen, 6 Bld du Maréchal Juin, 14050 Caen cedex, France
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Abstract

Here we present results on the first atomic simulation of the threading (a+c)-mixed dislocation cores in wurtzite GaN. These calculations are based on a modified Stillinger-Weber potential. For this dislocation two core configurations are shown to be stable, one with a complex double 5/6-atoms rings and the other a with 5/7-atom rings structures. The two cores contain neither wrong nor dangling bonds.

Keywords

dislocationsIII-Vsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 892 , 2005 , 0892-FF26-10
Copyright
Copyright © Materials Research Society 2006

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