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
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N.-H. Yu
Department of Physics, Baylor University, Waco, TX 76798, USA
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K.T. Park
Department of Physics, Baylor University, Waco, TX 76798, USA
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Z. Liao
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
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G. Li
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
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X. He
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
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J. Teng
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
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J. Zhang
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
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E.W. Plummer
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA