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RESEARCH PRODUCT
Instability of cuboctahedral copper clusters.
Seppo ValkealahtiM. Manninensubject
Atomic clusterMaterials sciencechemistryIcosahedral symmetryChemical physicsPure metalsMelting temperaturePhysics::Atomic and Molecular ClustersCluster sizechemistry.chemical_elementMoleculeCopperInstabilitydescription
Equilibrium structures of copper clusters up to 10 000 atoms are studied using molecular-dynamics and effective-medium theory. Icosahedral closed-shell clusters are most stable up to \ensuremath{\sim}2500 atoms and the Wulff polyhedra are favored for larger clusters. Cuboctahedral closed-shell clusters up to \ensuremath{\sim}2000 atoms are unstable. They undergo a nondiffusive transition to an icosahedral structure at low temperatures and melt directly above the fcc-cluster-melting temperature. The melting temperature decreases with decreasing cluster size but not as deeply as has been reported for pure metals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-04-15 | Physical review. B, Condensed matter |