Phase diagrams for the adsorption of monomers with non-additive interactions

PINTO O. A; RAMIREZ-PASTOR A. J.; NIETO F. D.

SURFACE SCIENCE

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 651 p. 62 - 68

0039-6028

In several experimental systems phase diagrams coverage-temperature show a strongasymmetry. This behavior can be reproduced by including non-additive lateral interactions.In this work a Monte Carlo study on the canonical assembly of the criticalityof monomer adsorption with non-additive interactions is presented. Traditionalpairwise energies were replaced by other more general ones where the lateral interactionbetween two ad-atoms depends on the coverage at first sphere of coordination.These energies induce the formation of several non-additive ordered structures.Finite size scaling method was used to classify the order of phase transitionof each non-additive phase. On the other hand, the corresponding phase diagramsare formed naturally, in which case the diagrams show strong asymmetries