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Article
Permeability and kinetic coefficients for mesoscale BCF surface step dynamics: Discrete two-dimensional deposition-diffusion equation analysis
Physical Review B
  • Renjie Zhao, Iowa State University
  • James W. Evans, Iowa State University
  • Tiago J. Oliveira, Universidade Federal de Vicosa
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2016
DOI
10.1103/PhysRevB.93.165411
Abstract
A discrete version of deposition-diffusion equations appropriate for description of step flow on a vicinal surface is analyzed for a two-dimensional grid of adsorption sites representing the stepped surface and explicitly incorporating kinks along the step edges. Model energetics and kinetics appropriately account for binding of adatoms at steps and kinks, distinct terrace and edge diffusion rates, and possible additional barriers for attachment to steps. Analysis of adatom attachment fluxes as well as limiting values of adatom densities at step edges for nonuniform deposition scenarios allows determination of both permeability and kinetic coefficients. Behavior of these quantities is assessed as a function of key system parameters including kink density, step attachment barriers, and the step edge diffusion rate.
Comments

This article is published as Zhao, Renjie, James W. Evans, and Tiago J. Oliveira. "Permeability and kinetic coefficients for mesoscale BCF surface step dynamics: Discrete two-dimensional deposition-diffusion equation analysis." Physical Review B 93, no. 16 (2016): 165411, doi:10.1103/PhysRevB.93.165411. Posted with permission.

Copyright Owner
American Physical Society
Language
en
File Format
application/pdf
Citation Information
Renjie Zhao, James W. Evans and Tiago J. Oliveira. "Permeability and kinetic coefficients for mesoscale BCF surface step dynamics: Discrete two-dimensional deposition-diffusion equation analysis" Physical Review B Vol. 93 Iss. 16 (2016) p. 165411
Available at: http://works.bepress.com/james-evans/168/