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Diffusion of Au atoms and (5×2) phase formation on the Si(111) (7×7) surface

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  • Z. Chvoj
  • Z. Chromcová
  • V. Cháb

Abstract

In this article we investigate the complex 1D mesoscopic model of adatom diffusion and the evolution of an ordered phase on the substrate surface. The analysis of the theoretical model is compared with the experimental results of the spreading of Au adatoms on Si(111)-(7×7) surface. The steady state solutions and their stability conditions are determined within the concept of the traveling-wave solution. It is shown that the formation of the ordered phase (5×2) and the difference in the diffusion of Au on (7×7) and on (5×2) structure results in a sharp edge of diffusion front which corresponds to the coverage of a saturated (5×2) phase. This edge moves linearly in time and α can be determined by experiment. The system of model equations enables the damped waves solution or temporary evolution of two steps. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Suggested Citation

  • Z. Chvoj & Z. Chromcová & V. Cháb, 2010. "Diffusion of Au atoms and (5×2) phase formation on the Si(111) (7×7) surface," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 76(3), pages 453-461, August.
  • Handle: RePEc:spr:eurphb:v:76:y:2010:i:3:p:453-461
    DOI: 10.1140/epjb/e2010-00204-5
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