Abstract.
Simultaneous island nucleation and step flow growth on vicinal surfaces are studied by Monte Carlo simulations. Step edges experience meandering instability under growth conditions if there is a kink barrier suppressing adatom jumps around kink sites. This instability has a characteristic length scale, with different scaling properties from the island separation scale. We show that there is a coupling between island nucleation and step edge instability. The length scale associated with nucleation begins to couple with the wavelength of the step edge patterns when islands and steps coalesce. Only in the submonolayer regime step meandering is independent of island formation. In this regime the island separation has a cross-over scaling behaviour as terrace width is varied.
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Received: 9 April 2003, Published online: 19 November 2003
PACS:
81.15.Aa Theory and models of film growth - 68.55.Ac Nucleation and growth: microscopic aspects - 81.16.Rf Nanoscale pattern formation
M. Rusanen: Present address: Institut Français du Pétrole, Groupe de Modélisation Moléculaire, BP 311, 92852 Rueil-Malmaison, France
J. Kallunki: Present address: Laboratory of Physics, PO Box 1100, FIN-02015 HUT, Espoo, Finland
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Rusanen, M., Koponen, I.T. & Kallunki, J. Mixing length scales: step meandering and island nucleation on vicinal surfaces. Eur. Phys. J. B 36, 141–147 (2003). https://doi.org/10.1140/epjb/e2003-00327-8
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DOI: https://doi.org/10.1140/epjb/e2003-00327-8