MOLECULAR-DYNAMICS OF SI CLUSTERS .2. SI CLUSTERS AT FINITE TEMPERATURES

A molecular-dynamics study has been performed to investigate SiN clust ers (N = 5 - 14, 26), using the three-body interaction potential of Le nnard-Jones/Axilrod-Teller. Starting from the ground-state structures with increasing temperature there are changes between different solid- like structures as well as transitions from the solid-like to the liqu id-like state to be observed. The melting temperature depends on the c luster size. The ''magic numbers'' 6 and 1 0 are to be observed not on ly at T = 0 K but also at higher temperatures as excellently stable.