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Ordering-enhanced dislocation glide in III-V alloys.
- Source :
- Journal of Applied Physics; Nov2013, Vol. 114 Issue 20, p203506, 5p, 2 Diagrams, 1 Chart, 1 Graph
- Publication Year :
- 2013
-
Abstract
- Ordering-induced effects on dislocations in metallic alloys have been extensively studied due to their importance in technology applications. We demonstrate that dislocation behavior in ordered III-V semiconductor alloys can be drastically different. This is because ordering in bulk metallic alloys is generally stable, whereas the surface-stabilized group-III sublattice ordering of a III-V alloy is only metastable in the bulk. Here, we show that dislocation glide can release some of the energy stored by ordering of III-V alloys, enhancing the glide of any dislocation which cuts through the ordered layers to create an antiphase boundary in the ordering pattern. This leads to an experimentally observed glide-plane switch which is unique to ordered III-V alloys. Implications for other unique strain-relaxation processes in III-V ordered alloys are also discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- ALLOYS
DISLOCATIONS in metals
METASTABLE states
ANTIPHASE boundaries
LATTICE theory
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 114
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 92660038
- Full Text :
- https://doi.org/10.1063/1.4833244