Dislocation core investigation by geometric phase analysis and the dislocation density tensor
Document Type
Article
Publication Date
2-7-2008
Abstract
The dislocation density tensor can be employed to 'localize' the dislocation core. We present a method for obtaining experimentally the dislocation core location and size from high resolution transmission electron microscopy observations using geometrical phase analysis. Experimental results are then compared with the results of atomistic simulations, and we also evaluate the applicability of continuum elasticity and its modifications for describing these results. The analysis is performed for partial dislocations in wurtzite GaN. Higher-order gradient elasticity theory is found to be in good agreement with the experimental observations. © 2008 IOP Publishing Ltd.
Publication Title
Journal of Physics D: Applied Physics
Recommended Citation
Kioseoglou, J.,
Dimitrakopulos, G.,
Komninou, P.,
Karakostas, T.,
&
Aifantis, E.
(2008).
Dislocation core investigation by geometric phase analysis and the dislocation density tensor.
Journal of Physics D: Applied Physics,
41(3).
http://doi.org/10.1088/0022-3727/41/3/035408
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/9579