Molecular dynamics simulation on a layer-by-layer homoepitaxial growth process of SrTiO3(001)

Momoji Kubo, Yasunori Oumi, Ryuji Miura, Andras Stirling, Akira Miyamoto, Masashi Kawasaki, Mamoru Yoshimoto, Hideomi Koinuma

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The effect of substrate temperature on the homoepitaxial growth process of a SrTiO3(001) surface has been investigated using our crystal growth molecular dynamics simulation code. SrO molecules were continuously deposited one by one on the SrTiO3(001) surface terminated by TiO2 atomic plane at 300 K. Two-dimensional and epitaxial growth of a SrO thin layer was observed on the SrTiO3(001) surface retaining perovskite type structure and (001) oriented configuration. However, some defects were constructed in the grown film at a low temperature of 300 K, which is in significant contrast to that at 713 K. In the latter case, a single flat and smooth SrO layer was formed without any defects, which is in good agreement with the experimental results. The self-diffusion coefficient, activation energy for surface migration, and adsorption energy of the deposited SrO molecules on the SrTiO3(001) surface were discussed. A higher migration ability of the deposited SrO molecules at high temperature was found to lead to complete layer-by-layer homoepitaxial growth.

Original languageEnglish
Pages (from-to)8601-8606
Number of pages6
JournalJournal of Chemical Physics
Volume109
Issue number19
DOIs
Publication statusPublished - 1998 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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