Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/1235
Title: Self-assembly and ordering mechanisms of Ge islands on prepatterned Si(001)
Authors: Pascale, Alina 
Berbezier, Isabelle 
Ronda, Antoine 
Kelires, Pantelis C. 
Issue Date: 2008
Publisher: The American Physical Society
Source: Physical Review. Volume 77, Issue 7
Abstract: Ge deposition on Si 001 substrates patterned by focused ion beams is a promising route toward fabricating highly ordered quantum dots. Depending on the growth temperature T, remarkable orderings of the assembled islands are observed. At low T’s, when diffusion is limited, a metastable phase with dots nucleating in the holes prevails. At high T’s, when diffusion is not limited by kinetics, an equilibrium ordered phase is observed with dots nucleating on the terraces in between the pits. At intermediate T’s, random growth arises. Monte Carlo simulations shed light onto this phenomenon. It is shown that the average stress energy of the equilibrium ordered configuration is significantly lower than the energy of configurations with islands positioned in the pits. Random nucleation gives rise to saddle configurations between the two ordered phases.
URI: http://ktisis.cut.ac.cy/handle/10488/1235
DOI: 10.1103/PhysRevB.77.075311
Rights: ©2008 The American Physical Society
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