Oscillatory temporal behavior in an autocatalytic surface reaction model

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Abstract

We discuss an autocatalytic surface reaction model A+B→2B, where particle A (B) adsorbs (desorbs) the surface with rate constant ζ (1-ζ). We present numerical results from Monte Carlo simulations in dimensions d=1, 2, and 3, as well as some analytical results, which are valid in any dimension. Especially the static aspects of this model, like the behavior of the average coverages as a function of the control parameter ζ, are well understood from simple arguments which use the rate equations. Numerical studies of the temporal behavior of this model reveal periodic oscillations in the coverages for d=2 and 3, but not for d=1. Our data show that these periodic oscillations are related to synchronized avalanches of autocatalytic reactions. These avalanches occur with a well defined frequency, and come in all possible sizes. To explain this effect we give a heuristic argument, which postulates that the model is driven toward a critical state of a random deposition problem.

Details

Original languageEnglish
Pages (from-to)4170-4178
JournalPhysical Review E
Volume55
Issue number4
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

    Research areas

  • catalysis, surface reaction

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