Island formation without attractive interactions

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

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11 pages, 4 figures

Scientific paper

10.1103/PhysRevB.77.073408

We show that adsorbates on surfaces can form islands even if there are no attractive interactions. Instead strong repulsion between adsorbates at short distances can lead to islands, because such islands increase the entropy of the adsorbates that are not part of the islands. We suggest that this mechanism cause the observed island formation in O/Pt(111), but it may be important for many other systems as well.

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