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Novel Structural Motifs in Clusters of Dipolar Spheres: Knots, Links and Coils

Mark A. Miller, David J. Wales

cond-mat.softarXiv:cond-mat/0511178

Abstract

We present the structures of putative global potential energy minima for clusters bound by the Stockmayer (Lennard-Jones plus point dipole) potential. A rich variety of structures is revealed as the cluster size and dipole strength are varied. Most remarkable are groups of closed-loop structures with the topology of knots and links. Despite the large number of possibilities, energetically optimal structures exhibit only a few such topologies.

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