Optically detected magnetic resonance studies of heavily N-doped material at 24GHz revealed an anisotropic spectrum which could be attributed to a deep donor that comprised a Se vacancy pair and an impurity. The spectrum was trigonal along <111>, with g|| = 2.0072 and g = 2.0013. A comparison of this g-tensor with previous results suggested that the spectrum could be attributed to VSe-X, where X was probably Cu or Ag. By combining this result with published photoluminescence and optically detected magnetic resonance data, it was shown that N-doped ZnSe had 3 distinct donors which included both impurities and intrinsic defects.

T.A.Kennedy, E.R.Glaser, B.N.Murdin, C.R.Pidgeon, K.A.Prior, B.C.Cavenett: Applied Physics Letters, 1994, 65[9], 1112-4