Abstract
Structures of TiO 2(1 1 0) surfaces between p(1×1) and p(1×2) are observed by scanning tunneling microscopy (STM). We confirm existence of two types of p(1×2) rows by comparison with results of impact collision ion scattering spectroscopy (ICISS), i.e., one has Ti 2O unit rows on low reduced surface, and another has Ti 2O 3 unit rows on the heavily reduced surface. We also found that: (1) the low energy electron diffraction (LEED) on the Ti 2O surface shows the p(1×2) pattern though the every two spots for [ 1 ̄ 1 0] -direction is intense, and (2) the reflection high-energy electron diffraction (RHEED) on the Ti 2O surface shows the only p(1×1) pattern though the surface manifestly has p(1×2) periodicity. The growing process of p(1×2) surface with Ti 2O unit rows from the p(1×1) surface is also elucidated.
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