Science and Technology Production
Article
Authorship
M. C. Giménez
;
F. Nieto
;
A. J. Ramirez-Pastor
Date
2006
Publishing House and Editing Place
American Institute of Physics
Magazine
JOURNAL OF CHEMICAL PHYSICS
(pp. 1847071-1847077)
American Institute of Physics
Summary
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In the present paper, the connection between surface order-disorder phase transitions and the percolating properties of the adsorbed phase has been studied. For this purpose, four lattice-gas models in the presence of repulsive interactions have been considered. Namely, monomers on honeycomb, square, and triangular lattices, and dimers (particles occupying two adjacent adsorption sites) on square substrates. By using Monte Carlo simulation and finite-size scaling analysis, we obtain the percola...
In the present paper, the connection between surface order-disorder phase transitions and the percolating properties of the adsorbed phase has been studied. For this purpose, four lattice-gas models in the presence of repulsive interactions have been considered. Namely, monomers on honeycomb, square, and triangular lattices, and dimers (particles occupying two adjacent adsorption sites) on square substrates. By using Monte Carlo simulation and finite-size scaling analysis, we obtain the percolation threshold theta_c of the adlayer, which presents an interesting dependence with w/k_BT (w,k_B, and T being the lateral interaction energy, the Boltzmann constant, and the temperature, respectively). For each geometry and adsorbate size, a phase diagram separating a percolating and a nonpercolating region is determined.
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Key Words
monomersPhase transitionsPercolationdimers