Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy

Abstract

The composition of InxGa1̃-̃xN nanorods grown by molecular beam epitaxy with nominal x~̃=~̃0.5 has been mapped by electron microscopy using Z-contrast imaging and x-ray microanalysis. This shows a coherent and highly strained core-shell structure with a near-atomically sharp boundary between a Ga-rich shell (x~̃~̃~̃0.3) and an In-rich core (x~̃~̃~7̃), which itself has In- and Ga-rich platelets alternating along the growth axis. It is proposed that the shell and core regions are lateral and vertical growth sectors, with the core structure determined by spinodal decomposition.

Publication
Nanotechnology

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