A study was made of the polarization of a predominant 1μm photoluminescence band which was produced by in situ 2.5MeV electron irradiation at 4.2K. It was found to arise from a Frenkel pair which was produced on the Zn sub-lattice. Optically detected electron paramagnetic resonance data revealed the presence of Frenkel pairs on the Te sub-lattice. All of the pairs disappeared in various annealing stages, from 35 to 120K. The Te sub-lattice pairs could also be caused to disappear by optical injection at 1.5K. Deconvolution of the Te interstitial contribution to the S = 1 optically detected electron paramagnetic resonance spin Hamiltonian parameters suggested that it was Tei-. This was only slightly distorted off-center from a Td interstitial site. The distortion, when viewed as being partly of Jahn-Teller origin, provided an explanation for its optically-induced migration.

Frenkel Pairs on the Two Sub-Lattices of ZnTe. S.J.Uftring, C.Bozdog, M.Linde, A.Dörnen, G.D.Watkins: Physical Review B, 2000, 62[11], 7195-205