Abstract
We study through numerical simulations the phase behavior of a 2D system of particles interacting through a Gaussian repulsive core supplemented with a short-range attraction and a long-range repulsion. We find that the system investigated forms a variety of crystals, a phase characterized by stripe patterns, and quasicrystalline phases displaying 8-fold, 12-fold, and 18-fold symmetry. We discover that, in a narrow density range, particles self-assemble into remarkable clusters with dodecagonal symmetry, a phenomenon to our knowledge never reported previously in the literature.
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