Arsenic antisite defects in AlxGa1xAs observed by luminescence-detected electron-spin resonance

Abstract
We report on luminescence and optically detected electron-spin resonance investigations in Alx Ga1xAs. The luminescence band found for 0.17≤x≤0.65 is caused by a deep donor-acceptor recombination involving an arsenic antisite defect with an energy-level position at EVB+0.97±0.02 eV. Neither the energy-level position nor the electron-spin resonance spectrum vary with the alloy composition.