Effects of the sticking probability on the scaling of the island density in a point island model.
The behavior of the island density exponent chi for a model of deposition, nucleation, and aggregation of particles, forming point islands with a sticking probability p in one dimension, is analyzed. Using Monte Carlo simulation we found that chi depends on p. For p=1 we obtain chi congruent with 1/4, the well-known result for perfect sticking and one-dimensional diffusion. Interestingly, as p is decreased, chi adopts higher values. Possible reasons for this behavior are addressed. The universal result for a one-dimensional diffusion, chi=1/4, is expected to be recovered, for all p, only in the asymptotic regime.
Mazzitello
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Physics Department, School of Exact and Natural Sciences, Universidad Nacional de Mar del Plata, Deán Funes 3350, 7600 Mar del Plata, Argentina.
Aldao
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Mártin
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