Characterization of high purity GaAs grown by molecular beam epitaxy

Abstract
High purity n-type GaAs grown by molecular beam epitaxy has been characterized using the Hall effect, dye laser excited low-temperature luminescence, and far-infrared magnetospectroscopy. Peak mobilities exceed 105 cm2 V−1 s−1. Carbon is shown to be the dominant background acceptor impurity, whereas silicon and two additional, unidentified donors make up the background donor manifold.