Monte Carlo study of dimer adsorption at monolayer on square lattices

RAMIREZ-PASTOR, A.J.; RICCARDO, J.L.; PEREYRA, V.D.

SURFACE SCIENCE

ELSEVIER SCIENCE BV

Año: 1998 vol. 411 p. 294 - 302

0039-6028

The localized monolayer adsorption of interacting homonuclear dimers (AA) on square lattices is studied using a lattice-gas model. The effect of lateral interactions on the behavior of different thermodynamic quantities is considered. Phase diagrams (i.e. critical temperature versus coverage) are calculated using Monte Carlo simulation and finite-size scaling for both attractive and repulsive nearest-neighbors lateral interactions. Of special interest is the repulsive case where different ordered structures are observed, confirming the results given by Phares et al. [J. Phys. A: Math. Gen. 26 (1993) 6847] based upon exact transfer-matrix method for dimers on a semi-infinite square lattice. © 1998 Elsevier Science B.V. All rights reserved.