It was recalled that crystals with a wurtzite-type structure had polar surfaces, (00•1) and (00•¯1), which were terminated by Zn and O, respectively. Atomic force microscopic observations showed that step/terrace structures were formed on the (00•1) and (00•¯1) surfaces, in which the step-height was usually equal to half of the lattice parameter. The ionic arrangement of the surfaces was determined by means of coaxial impact-collision ion-scattering spectroscopy. The spectra had a periodicity of 60º for azimuth angle dependence. By analyzing the spectra, it was shown that the (00•1) and (00•¯1) surfaces had a single dangling bond and that no ionic distortion occurred.

Surface Structure of ZnO Single Crystals Analyzed by Ion Scattering Spectroscopy. H.Maki, N.Ichinose, S.Sekiguchi, N.Ohashi, T.Nishihara, H.Haneda, J.Tanaka: Japanese Journal of Applied Physics - 1, 1999, 38[5A], 2741-4