Te and Cd nuclear-magnetic-resonance study of local structure and bonding in ${\mathrm{Cd}}_{1\mathrm{-}\mathrm{x}}$${\mathrm{Zn}}_{\mathrm{x}}$Te

Magic-angle sample-spinning NMR spectra of ${}_{}{}^{111}{}_{}{}^{}\mathrm{Cd}$ and ${}_{}{}^{125}{}_{}{}^{}\mathrm{Te}$ in ${\mathrm{Cd}}_{1\mathrm{-}\mathrm{x}}$ ${\mathrm{Zn}}_{\mathrm{x}}$Te semiconductor alloys have been recorded for 0≤x≤1. The ${}_{}{}^{111}{}_{}{}^{}\mathrm{Cd}$ NMR spectra exhibit a single line whose chemical shift and linewidth depend on x. The linear dependence of the ${}_{}{}^{111}{}_{}{}^{}\mathrm{Cd}$ chemical shift on x is assumed to be the result of charge transfer, while the linewidth dependence is shown to be the result of a random distribution of Zn atoms which are next-nearest neighbors to Cd. The ${}_{}{}^{125}{}_{}{}^{}\mathrm{Te}$ spectra exhibit multiple lines, their number and chemical shift depending on x. The different chemical shifts of the Te lines are assigned to the five different cation configurations—${\mathrm{Cd}}_{\mathrm{n}}$ ${\mathrm{Zn}}_{4\mathrm{-}\mathrm{n}}$, n=0,...,4—around the Te. The intensities of the experimental Te lines are compared to those in spectral simulations obtained by assuming a random distribution of the cations. The comparison reveals small deviations from a random distribution of the cations. This clustering phenomenon and the effect of the bond-length changes with x on the ${}_{}{}^{125}{}_{}{}^{}\mathrm{Te}$ chemical shift are discussed.