Abstract
We report Zeeman measurements on CdTe layers grown by photoassisted molecular beam epitaxy (PAMBE). The main acceptor bound exciton luminescence is associated with cadmium vacancy-donor complex centers (Cd v-D Te and D Te-Cd v-D Te). We observe strong linear polarization in the acceptor bound exciton region and for the pair bands associated with these complexes. The linear polarization is believed to be due to a preferential alignment of the complex centers along one of the 〈011〉 directions. From the measurements in a magnetic field, we determine the splitting parameters for excitons bound to these complex centers as well as for excitons bound to substitutional acceptors. From our studies we propose a change of a complex Cd v-2D Te to a complex Cd V-D Te caused by the illumination of the substrate during growth.
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