Surface order-disorder phase transitions and percolation

M. C. GIMÉNEZ; F. NIETO; A. J. RAMIREZ-PASTOR

JOURNAL OF CHEMICAL PHYSICS

Año: 2006 vol. 125 p. 184707 - 184713

0021-9606

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
c of the adlayer, which presents an interesting dependence with
particles occupying two adjacent adsorption sites on square substrates. By using Monte Carlo simulation and finite-size scaling analysis, we obtain the percolation threshold
c of the adlayer, which presents an interesting dependence with on square substrates. By using Monte Carlo simulation and finite-size scaling analysis, we obtain the percolation threshold
c of the adlayer, which presents an interesting dependence with
c of the adlayer, which presents an interesting dependence with w/kBT
w, kB, 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./kBT
w, kB, 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.