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Core structure of a 90° partial dislocation in (a) SP and (b) DP reconstructions, showing only the atoms present in the glide bylayer. White (gray) circles represent atoms in the top (bottom) sublayer. Vacancies were considered in two SP-core sites (b,q) and in four DP-core sites (n,b,u,p). Light gray shading shows the stacking-fault region.
Formation energies (in eV) of vacancies at several charge states, in (a) SP- and (b) DP-core sites, as a function of the electronic Fermi level.
Change in the vacancy formation energy (in eV), with respect to a bulk-site vacancy, for the central core sites of the SP and DP reconstructions, as shown in Fig. 1.
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