MONTE-CARLO STUDY OF DIMER ADSORPTION AT MONOLAYER ON SQUARE LATTICES

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