Surface Reconstruction of TiO$_{2}$(001) Studied by STM and LEED

ORAL

Abstract

TiO$_{2}$(001) has been investigated by scanning tunneling microscopy (STM) and low energy electron diffraction (LEED). After cycles of Ar sputtering and surface annealing at moderate temperatures (up to 600\r{ }C for 15 minutes), TiO$_{2}$(001) reveals the so-called latticework reconstruction: row-like linear structures running along [110] and [1-10] directions. Each row further consists of bright spots separated by 6.5 {\AA}, the lattice constant of the rutile along [110] and [1-10]. In some areas, the rows are separated by 6.5 {\AA} and with the increasing step height of 3 {\AA}, thus forming {\{}111{\}} microfacets. In other areas, the rows are distributed in a more random fashion. Together with LEED, the STM data suggest that the surface reconstruction can be described by added rows of stoichiometric TiO$_{2}$. Further details of the reconstruction model will be presented.

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Authors

  • N.-H. Yu

    • Department of Physics, Baylor University, Waco, TX 76798, USA

  • K.T. Park

    • Department of Physics, Baylor University, Waco, TX 76798, USA

  • Z. Liao

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • G. Li

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • X. He

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • J. Teng

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • J. Zhang

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • E.W. Plummer

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA