The structure of the electrically detected magnetic resonance signal from a common type of diode was resolved for various orientations of the magnetic field in the (111) plane. The center was found to have C3v symmetry. It was proposed that the signal was due to a broken bond, or to a combination of co-linear broken bonds, in a vacancy cluster which acted as a recombination center. The most likely cluster was a di-vacancy which had captured an electron in an anti-bonding state that was formed from the most distant broken bonds, and a hole in a bonding state that was associated with the di-vacancy.

Z.Xiong, D.J.Miller: Journal of Applied Physics, 1995, 78[8], 4895-8