Paper Title:
Kinetic Monte Carlo Simulation of Nucleation and Growth Behavior in Surfactant-Mediated Epitaxy
  Abstract

The behavior of island shape transition and nucleus density evolution in the early stage of epitaxial growth mediated by a monolayer of surfactant is studied by using a kinetic Monte Carlo simulations. The main kinetic processes included in the model are deposition, diffusion of atoms, exchange of adatoms with their underneath surfactant atoms, and reexchange in which an exchanged adatom resurfaces to the top of the surfactant layer. The simulation produces pattern transitions from small compact islands at low temperatures, to fractal-like islands at intermediate temperatures where the deposited adatoms can be easily incorporated into the surfactant layer, and then to regular compact islands at high temperatures where the reexchange becomes active. The island density as a function of temperature exhibits a complex N-shape. These results provide a reasonable explanation for the observed temperature dependence of the growth mode in existing experiments.

  Info
Periodical
Solid State Phenomena (Volumes 121-123)
Edited by
Chunli BAI, Sishen XIE, Xing ZHU
Pages
1149-1152
DOI
10.4028/www.scientific.net/SSP.121-123.1149
Citation
D.M. Wang, Z.J. Ding, "Kinetic Monte Carlo Simulation of Nucleation and Growth Behavior in Surfactant-Mediated Epitaxy", Solid State Phenomena, Vols. 121-123, pp. 1149-1152, 2007
Online since
March 2007
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