Formation of Polymorphic Cluster Phases for Purely Repulsive Soft Spheres

Details Formation of Polymorphic Cluster Phases for Purely Repulsive Soft Spheres Formation of Polymorphic Cluster Phases for Purely Repulsive Soft Spheres

2005-11-07

arxiv.org/abs/cond-mat/0511172v1

Phys. Rev. Lett. 96, 045701 (2006)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.019901

We present results from density functional theory and computer simulations that unambiguously predict the occurrence of first-order freezing transitions for a large class of ultrasoft model systems into cluster crystals. The clusters consist of fully overlapping particles and arise without the existence of attractive forces. The number of particles participating in a cluster scales linearly with density, therefore the crystals feature density-independent lattice constants. Clustering is accompanied by polymorphic bcc-fcc transitions, with fcc being the stable phase at high densities.

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