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Full Description
Thermodynamic concepts of aggregate states and their phase transitions - veloped during the 19th Century and are now the basis of our contem- rary understanding of these phenomena. Thermodynamics gives an universal, macroscopic description of the equilibrium properties of phase transitions - dependent of the detailed nature of the substances. However understanding the nature of phase transitions at the microscopic level requires a di?erent approach, one that takes into account the speci?cs of the interparticle int- actions. In this book, we lay the groundwork that connects the microscopic phenomena underlying phase changes with the macroscopic picture, but in a somewhat restricted way. We deal only with systems in which electronic excitations are not important, only with atomic systems, and only with - mogeneous systems. We also restrict our analysis to systems in which only pairwise interactions need be included, and, in many parts of the treatment, to systems in which one need consider only the interactions between nearest neighbor atoms. In establishing these restrictions, we can be guided by the solid and liquid states of inert gases and the phase transitions between them, althoughthesubsequentanalysisisrelevantandapplicableforaseriesofother physical systems. To study the behavior of a system of many interacting identical par- cles, we work extensively with its potential energy surface (PES), a surface in a many-dimensional space whose independent variables are the monomer coordinates or some transformation thereof. A central property of any m- tidimensional PES is its large number of local minima.
Contents
Thermodynamics of Ensembles of Classical Particles.- Excitations in Simple Atomic Ensembles.- Structures of Ensembles of Interacting Particles.- Thermodynamics of Dense Gases and Liquids.- Clusters with Short-Range Interaction.- Ensembles of Classical Particles with Repulsion.- Configurational Excitations and Aggregate States of Ensembles of Classical Particles.- Configurational Excitation and Voids in Ensembles of Bound Classical Atoms.- Configurational Cluster Excitation with Pairwise Interactions.- Phase Transitions in Macroscopic Systems of Atoms.- Melting of Clusters and Bulk Atomic Ensembles.- Dynamics of Configurational Excitations in Ensembles of Classical Particles.- Coexistence of Cluster Phases.- Glassy States of an Ensemble of Bound Atoms.- Transport of Voids in Nucleation Processes.- Conclusion and Summary.
