Detailed thermally stimulated-current measurements have been conducted on an undoped. semi-insulating GaAs crystal under 1.06 μm illumination at 15 K. By combining with Hall voltage measurements, we confirmed the presence of hole traps that show similar activation energies with the one proposed for the actuator level in the deep acceptor-mediated photoquenching model of EL2 [Suemitsu et al., Phys. Rev. B 52, 1666 (1995)]. The observed quenching of these hole traps suggests that the actuator level be, most likely, a part of the metastable complex.
ASJC Scopus subject areas
- Physics and Astronomy(all)