A model metal potential exhibiting polytetrahedral clusters

Abstract

Putative global minima have been located for clusters interacting with an aluminium glue potential for N<190. Virtually all the clusters have polytetrahedral structures, which for larger sizes involve an ordered array of disclinations that are similar to those in the Z, H and sigma Frank-Kasper phases. Comparisons of sequences of larger clusters suggest that the majority of the global minima will adopt the bulk face-centred-cubic structure beyond N=500.

14 pages, 7 figures

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• Intrinsic features of an ideal glass
• Manipulating the Glass Transition in Nanoscale