title: Novel structural motifs in clusters of dipolar spheres: knots, links, and coils.
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.
authors.affiliation: University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, United Kingdom.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Miller
authors.forename: David J
authors.initials: DJ
authors.lastname: Wales