We demonstrate that single-terminated atomically flat surfaces of polar SrTiO3 (110) can be obtained by annealing in air at temperatures above 1000°C. We show that a morphological transition occurs from disordered step edges to faceted step edges in the range of 1000–1100°C with appropriate annealing conditions. The influence of miscut angles (polar and azimuthal) on the surface nanostructure, i.e., step bunching and faceting of step edges, is described. We show how the azimuthal angle has a critical role for the step-edge faceting and the step-bunching formation.
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Bachelet et al. (2007) studied this question.