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Structural Units and Energy of Grain Boundaries in GaN

Published online by Cambridge University Press:  01 February 2011

Jun Chen ,
Pierre Ruterana  and
Gerard Nouet
Jun Chen
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, ENSICAEN, 6 Boulevard du Maréchal Juin 14050 Caen Cedex, France
Pierre Ruterana
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, ENSICAEN, 6 Boulevard du Maréchal Juin 14050 Caen Cedex, France
Gerard Nouet
Affiliation:
Laboratoire Structure des Interfaces et Fonctionnalité des Couches Minces, UMR CNRS 6176, ENSICAEN, 6 Boulevard du Maréchal Juin 14050 Caen Cedex, France
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Abstract

The energy of coincidence grain boundaries in wurtzite structure was investigated with the Stillinger-Weber potential after modification for GaN. A boundary can have two interfaces with a different period corresponding to the edge and diagonal of the unit cell of coincidence site lattices for rotations around [0001] in the range 0–60°. Their energy depends mainly on the atomic structure of the dislocation cores used for the boundary plane reconstruction. As a function of the structure units in the period, the energy of the edge and diagonal shows two minima which are observed for the edge boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 798: Symposium Y – GaN and Related Alloys , 2003 , Y5.34
Copyright
Copyright © Materials Research Society 2004

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References

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