IDENTIFICATION OF THE CHLORINE-A CENTER IN CDTE

The chlorine A center has been identified in CdTe using photoluminescence and optically detected magnetic-resonance techniques. The A center is found to be an acceptor with a binding energy E(a) = 120 +/- 3 meV and consists of a Cd vacancy and a Cl donor on a nearest Te site. The defect has trigonal symmetry with g parallel-to = 2.2 and g perpendicular-to = 0.4, assuming an effective spin S = 1/2. The interactions with the three Te neighbors are also resolved and the measured isotropic ligand hyperfine interaction amounts to (2.7 +/- 0.4) x 10(-2) cm-1.