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\bibitem{Khanam_etal2020} {\textquotedblleft}\textit{A demonstration of donor passivation through direct formation of V-As-i complexes in As-doped Ge$_{1-X}$Sn$_{x}$}{\textquotedblright}. Khanam A, Vohra A, Slotte J, Makkonen I, Loo R, Pourtois G, Vandervorst W, Journal Of Applied Physics \textbf{127}, 195703 (2020).   http://doi.org/10.1063/5.0003999

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