Percolative c(2×2) adlayer structure in nonequilibrium adsorption models

Thumbnail Image
Date
1989
Authors
Evans, James
Sanders, D.
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Research Projects
Organizational Units
Organizational Unit
Organizational Unit
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Ames National LaboratoryPhysics and AstronomyMathematics
Abstract

We consider simple adsorption models describing two systems [H2O on Fe(001) and O2 on Pd(100)] in which c(2×2) short-range order is formed during chemisorption, and metastable saturation states result. This ordering is characterized using concepts from correlated percolation theory. Rapid increases in average domain size near saturation are associated with ‘‘ghost percolation thresholds’’ just above saturation. Generalizing these adsorption models to include an island-forming propensity, α, is shown to move the saturation state closer to c(2×2) percolation. The α→∞ behavior is elucidated by analyzing corresponding ‘‘continuum two-phase grain growth models’’ using ideas from stochastic geometry, continuum, and random lattice percolation theory.

Comments

This article is published as Evans, J. W., and D. E. Sanders. "Percolative c (2× 2) adlayer structure in nonequilibrium adsorption models." Physical Review B 39, no. 3 (1989): 1587, doi:10.1103/PhysRevB.39.1587. Posted with permission.

Description
Keywords
Citation
DOI
Copyright
Sun Jan 01 00:00:00 UTC 1989
Collections