'Magic-size' GeSi and Si nanocrystals created by ion bombardment of hexagonal SiC; a molecular dynamics study

摘要

We recently showed that GeSi and Si nanocrystals created after Ge- and Si-ion implantation into hexagonal SiC and subsequent annealing contain a high percentage of hexagonality. Here we demonstrate that the nanocrystals are of 'magic sizes' and are microtwinned. Both these features are explained by molecular dynamics calculations.