FIG. 1.(a) Scheme of antiphase domains made from the periodic replicas in the xy plane of the initial simulation domain [shown in Fig.2(b)]. Green(silicon)and gray(carbon)atoms outline the four APB and the different polarities of the substrate: considering the periodic boundary conditions on the xy plane, the substratelooks like an outline of APDs, favoring defect interactions in a reasonable time and space scale.(b) Zoom of the antiphase boundary with anti-sitesalong{110} crystalplanes;(c)orthogonal view of an antiphase boundary (110), representing a zoom of the APB shown in the (b) panel. The dashed and continuous segments highlight, respectively, the ð 1 1 1Þ Si-face and the ð11 1Þ C-face with different polarities; the red arrow depicts the APB drift during an epitaxial growth along the (001) surface due to the different growth velocity of the exposedð11 1ÞC-faceandtheð 1 1 1ÞSi-face.