Self-organized vertical and lateral ordering in quantum-dot superlattices is investigated as a function of PbSe dot layer thickness. An efficient lateral ordering and face centered cubic-like dot stacking occurs only for PbSe thicknesses between 4–6 monolayers. For smaller thicknesses, no correlations are formed, whereas for larger thicknesses the dots are vertically aligned along the growth direction. These transitions are explained by changes in interlayer dot interactions as a function of the dot size.
Dot size dependence of vertical and lateral ordering in self-organized quantum-dot superlattices
G. Springholz, A. Raab, R. T. Lechner, V. Holy; Dot size dependence of vertical and lateral ordering in self-organized quantum-dot superlattices. Appl. Phys. Lett. 3 February 2003; 82 (5): 799–801. https://doi.org/10.1063/1.1539279
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