Evidence for the Tunneling Site on Transition-Metal Oxides: TiO2(110).

We present atomically resolved scanning tunneling microscopy (STM) images from TiO 2(110) surfaces. After annealing nearly perfect stoichiometric 1 3 1 surfaces to elevated temperatures ultrahigh vacuum, randomly distributed oxygen vacancies are observed. The apparent shape defects provides strong evidence that the STM is imaging undercoordinated Ti atoms… CONTINUE READING