METASTABLE TRANSFORMATION OF EL2 IN SEMIINSULATING GAAS - THE ROLE OFTHE ACTUATOR LEVEL AND THE PHOTOIONIZATION OF EL2

The metastable transformation of EL2 is modeled in terms of an additio nal acceptor level, whose role is the activation of the metastable tra nsformation of EL2. This level, called the actuator of the metastabili ty, enables the metastable transformation after capturing a hole. Ther mal emission of this hole at 80-85 K renders the metastable transforma tion of EL2 quite ineffective above this temperature. The double accep tor 78/203 meV is proposed as a possible actuator. (C) 1996 American I nstitute of Physics.