Abstract
A theoretical strategy has been proposed for the semiconductor quantum rings (QRs) self-assembly on flat substrates via the Stranski-Krastanov growth mode, in which the embedded inclusions are made of a third material with an appropriate lattice constant. Taking the Ge/Si (001) system with embedded Sn inclusions as an example, we carried out the kinetic Monte Carlo (KMC) simulations and demonstrated that the well-defined array of Ge QRs can form on the smooth surface of Si (001) substrates via the proposed self-assembly, and the size and shape of the produced QRs can be easily controlled by the embedded depth and the separation distance of the inclusions. Theoretical analyses and KMC simulations showed that the developed self-assembly could be expected to be a convincing approach to fabricate semiconductor QRs on the flat surface.
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