Surface and Bulk Properties of Deposits Grown with a Bidisperse Ballistic Deposition Model - Condensed Matter > Statistical MechanicsReport as inadecuate




Surface and Bulk Properties of Deposits Grown with a Bidisperse Ballistic Deposition Model - Condensed Matter > Statistical Mechanics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We study roughness scaling of the outer surface and the internal porousstructure of deposits generated with the three-dimensional bidisperse ballisticdeposition BBD, in which particles of two sizes are randomly deposited.Systematic extrapolation of roughness and dynamical exponents and thecomparison of roughness distributions indicate that the top surface hasKardar-Parisi-Zhang scaling for any ratio F of the flux between large and smallparticles. A scaling theory predicts the characteristic time of the crossoverfrom random to correlated growth in BBD and provides relations between theamplitudes of roughness scaling and F in the KPZ regime. The porosity of thedeposits monotonically increases with F and scales as F^{1-2} for small F,which is also explained by the scaling approach and illustrates the possibilityof connecting surface growth rules and bulk properties. The suppression ofrelaxation mechanisms in BBD enhances the connectivity of the deposits whencompared to other ballisticlike models, so that they percolate down to F~0.05.The fractal dimension of the internal surface of the percolating deposits isD F~2.9, which is very close to the values in other ballisticlike models andsuggests universality among these systems.



Author: F. A. Silveira, F. D. A. Aarão Reis

Source: https://arxiv.org/







Related documents