Pattern formation and directional and spatial ordering of edge dislocations in bulk GaN: Micro-photoluminescence spectra and continuum elastic calculations

URN to cite this document:: urn:nbn:de:bvb:355-epub-25795
DOI to cite this document:: 10.5283/epub.2579

Schwarz, Uli ;

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Date of publication of this fulltext: 05 Aug 2009 13:40

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Abstract

We present a detailed microphotoluminescence study of the long-range strain fields surrounding threading dislocations as well as their interaction and pattern formation in GaN bulk crystals. The stress patterns are detected by tiny energy shifts of the near-band-edge spectral lines and show a dipolelike stress state around the dislocation core of edge- or mixed-type dislocations, with an angular ...