XXVII Международный симпозиум Нанофизика и наноэлектроника", Нижний Новгород, 13-16 марта 2023 г. Формирование заряженных вакансий в анионной подрешетке AlAs

Abstract

The vacancy formation dynamics in doped semicon- ductor heterostructures with quantum dots (QDs) formed in the AlAs anionic sublattice has been studied. A theoretical model that describes the effect of doping on the vacancy generation dynamics is constructed. It is shown that the generation of positively charged arsenic vacancies is more probable than the generation of neutral ones at high hole concentrations. On the other hand, at high electron concentrations, the formation of neutral arsenic vacancies is more efficient than that positively charged ones. It has been experimentally revealed that the vacancy-stimulated high- temperature diffusion of antimony is enhanced (suppressed) in p-(n-)-doped heterostructures with Al(Sb,As)/AlAs QDs.