The atomic surface structure of SrTiO3 (001) studied with synchrotron X-rays

V. Vonk, S. Konings, G.J. van Hummel, Sybolt Harkema, H Graafsma

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Abstract

The atomic surface structure of single terminated SrTiO3(0 0 1) (1 × 1) is investigated employing surface X-ray diffraction. In order to obtain these surfaces a special treatment is needed consisting of chemical etching and annealing. Since this is done in an aqueous and subsequently oxygen environment, after which the crystals are kept at ambient conditions, the surface is studied in air. Crystal truncation rods are measured and several models that are proposed in literature in recent years are tested against the experimental data. These models include surface rumpling, low temperature-like distortions, strontium adatom and lateral displacement distortions for both TiO2 and SrO-terminated surfaces. None of these models represents the data very accurately. A much better fit to the experimental results is obtained by using a model in which a TiO2-terminated crystal is covered by an oxygen layer.
Original languageUndefined
Pages (from-to)183-193
Number of pages10
JournalSurface science
Volume595
Issue number1-3
DOIs
Publication statusPublished - 2005

Keywords

  • Complex oxides
  • SXRD
  • Surface relaxation and reconstruction
  • Surfaces in ambient environment
  • METIS-224717
  • IR-77416

Cite this

Vonk, V., Konings, S., van Hummel, G. J., Harkema, S., & Graafsma, H. (2005). The atomic surface structure of SrTiO3 (001) studied with synchrotron X-rays. Surface science, 595(1-3), 183-193. https://doi.org/10.1016/j.susc.2005.08.010