Holed nanostructures formed by aluminum droplets on a GaAs substrate
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We have studied the morphology evolution of holed nanostructures formed by aluminum droplet epitaxy on a GaAs surface. Unique outer rings with concentric inner holed rings were observed. Further, an empirical equation to describe the size distribution of the outer rings in the holed nanostructures has been established. The contour line generated by the equation provides physical insights into quantum ring formation by droplets of group III materials on III–V substrates.
KeywordsDroplet epitaxy aluminum droplets MBE GaAs holed nanostructures
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010