Structural properties and glass transition in clusters

We have studied the structural and dynamical properties of several (Formula presented) clusters by the molecular-dynamics method combined with simulated annealing. The well-fitted glue potential is used to describe the interatomic interaction. The obtained atomic structures for (Formula presented), 55, and 147 are in agreement with results from ab initio calculations. Our results have demonstrated that the disordered cluster (Formula presented) can be considered as a glass cluster. The obtained thermal properties of glass cluster (Formula presented) are clearly different from the results for high-symmetry clusters, its melting behavior has properties similar to those of a glass solid. The present studies also show that the surface melting behavior does not exist in the studied (Formula presented) clusters.