Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8151389 | Journal of Crystal Growth | 2014 | 18 Pages |
Abstract
The onset of plastic relaxation via misfit dislocation (MD) formation in InxGa1âxN layers grown by metal-organic chemical vapor deposition on the (112¯2) semipolar plane of GaN substrates is investigated using high-resolution X-ray diffraction, transmission electron microscopy and cathodoluminescence. The results of critical thickness calculations for MD formation as a function of InxGa1âxN alloy composition x are compared with experimental observations. MD generation is observed initially as a result of slip on the (0001) slip plane, and subsequently as a result of additional slip on inclined {11¯00}-typem-planes, which eventually leads to an increase in threading dislocation density.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
Ingrid L. Koslow, Matthew T. Hardy, Po Shan Hsu, Feng Wu, Alexey E. Romanov, Erin C. Young, Shuji Nakamura, Steven P. DenBaars, James S. Speck,