On the premelting features in sodium clusters
Abstract
Melting in Nan clusters described with an empirical embedded-atom potential has been reexamined in the size range 55<=n<=147 with a special attention at sizes close to 130. Contrary to previous findings, premelting effects are also present at such medium sizes, and they turn out to be even stronger than the melting process itself for Na133 or Na135. These results indicate that the empirical potential isqualitatively unadequate to model sodium clusters.
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