The dopant and compound forming behavior of As and Au impurities in Ga2Te3

Abstract
The dopant and compound forming behavior of As and Au impurities in Ga2Te3 is investigated by the combined application of Mössbauer spectroscopy, x‐ray diffraction, optical transmission, and electrical measurements. Arsenic is shown to act as a n‐type dopant in Ga2Te3, and a ternary semiconductor AuGa2Te3 is identified. The results allow for a concise description of the ohmic contact formation mechanism in alloyed Au/Te/Au/GaAs and related structures.