Open AccessA study based on diffusion theory for exchange-reaction of RLA model
Author(s) -
Xiaoping Zheng,
Peifeng Zhang,
Dongrui Fan
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.425
Subject(s) - diffusion , kinetic monte carlo , work (physics) , monte carlo method , pulmonary surfactant , chemical physics , thermodynamics , diffusion process , reaction rate , kinetic energy , materials science , statistical physics , physics , chemistry , computer science , quantum mechanics , knowledge management , statistics , biochemistry , mathematics , innovation diffusion , catalysis
In the research work, on the basis of the classic diffusion theory we have advanced a novel model of the reaction limited aggregation (RLA), which involues the basic micro-processes. We firstly introduced the concept of exchange rate and have also simulated the growing process of surfactant-mediated epitaxial thin film growth with the kinetic Monte Carlo (KMC) method. By simulating, it was found that both surfactant atoms and adatoms would diffuse from one layer to another. This kind of diffusion mainly happens beween single atoms and the number of this diffusion increases with increasing growth temperature or increasing deposition depth. The exchange reaction of RLA model is the combination of several basic micro-processes. The majority of exchanges are not complete position exchange and the exchange ratio is not always equal to unity.