We report the first scanning tunneling microscopy (STM) study of single-crystalline anatase. Atomically resolved images of the (101) surface are consistent with a bulk-truncated $(1\mathrm{}\times 1)$ termination. Step edges run predominantly in the [010], $\left[1¯11\right],$ and $\left[1¯1¯1\right]$ directions. The surface is stable with very few point defects. Fourfold-coordinated Ti atoms at step edges are preferred adsorption sites and allow the identification of tunneling sites in STM.

• Received 10 October 2000

DOI:https://doi.org/10.1103/PhysRevB.62.R16334