Nonalloyed ohmic contacts to electron-beam-annealed Se-ion-implanted GaAs

Abstract
High donor concentrations (n=4×1019 cm−3) have been obtained by pulsed electron beam annealing of Se‐ion‐implanted GaAs. Nonalloyed ohmic contacts with rc⩽6×10−6 Ω cm2 were formed on these samples with no surface etching. Postanneal heating above 250 °C results in a two‐stage loss of carriers.