材料期刊网

The optical spectrum and electron paramagnetic resonance (EPR) parameters (gyromagnetic g factor and hyperfine structure constant A) for CdTe:V(3+) have been calculated using the modified crystal-field theory. In this theory, the covalency factors N(t), N(e) and the two spin-orbit (SO) coupling coefficients zeta(d), zeta(p) are included in T(d) symmetry. The calculated optical spectrum and EPR parameters agree reasonably well with the experimental values. In addition, the calculated results show that the contribution from the ligand Te(2-) to the EPR parameters cannot be neglected because the ligand Te(2-) possesses a large SO coupling coefficient and strong covalency.