Eutectic point in a simple lattice gas model

Details Eutectic point in a simple lattice gas model Eutectic point in a simple lattice gas model

1993-07-09

arxiv.org/abs/cond-mat/9307015v1

Physics

Condensed Matter

15 pages (incl. 8 Postscript figures), LaTeX, ITP-UH 21/93

Scientific paper

We investigate the phase diagram and the critical properties of the adsorbate system sulphur/ruthenium(0001) in the coverage region $\frac{1}{4} < \Theta < \frac{1}{3}$ by means of Monte-Carlo simulations of a simple lattice gas model on a triangular lattice. The model contains only repulsive nearest and next-nearest neighbor interactions. Combining results obtained by using both Glauber and Kawasaki kinetics in the simulations we identify two tricritical points, three coexistence regions and a eutectic point in the phase diagram of the system. Our results agree with the findings of recent experimental work on S/Ru(0001). Furthermore we are able to add certain details to the experimentally observed phase diagram.

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