Influence of Energy and Entropy on the Melting of Sodium Clusters
- 10 March 2003
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 90 (10), 103401
- https://doi.org/10.1103/physrevlett.90.103401
Abstract
Energetic and entropic influences on the melting temperatures of size selected sodium clusters are experimentally separated. It is shown that the energetic difference between solid and liquid is the leading influence for the still puzzling features in the size dependence of sodium melting points. Additionally, this energy difference decreases towards smaller cluster sizes and causes steplike melting phase transitions to vanish. The entropy difference between solid and liquid has been found to be strongly correlated with the energy and causes a pronounced damping of the energetic influences.Keywords
This publication has 19 references indexed in Scilit:
- Exchange Monte Carlo for Molecular Simulations with Monoelectronic HamiltoniansPhysical Review Letters, 2002
- Entropic effects on the structure of Lennard-Jones clustersThe Journal of Chemical Physics, 2002
- Entropic Effects on the Size Dependence of Cluster StructurePhysical Review Letters, 2001
- Melting in Large Sodium Clusters: An Orbital-Free Molecular Dynamics StudyThe Journal of Physical Chemistry B, 2001
- Mechanisms of phase transitions in sodium clusters: From molecular to bulk behaviorThe Journal of Chemical Physics, 2000
- Orbital-free molecular dynamics simulations of melting in Na8 and Na20: Melting in stepsThe Journal of Chemical Physics, 1999
- A measurement of the product branching ratio $f ({\rm b} \to \Lambda_{\rm b}) \cdot{\rm BR} (\Lambda_{\rm b} \to \Lambda {\rm X})$ in ${\rm Z}^0$ decaysThe European Physical Journal C, 1999
- Irregular variations in the melting point of size-selected atomic clustersNature, 1998
- Shells of atomsPhysics Reports, 1996
- Evidence for a size-dependent melting of sodium clustersThe Journal of Chemical Physics, 1994