Configurational density of states and melting of simple solids

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We analyze the behavior of the microcanonical and canonical caloric curves for a piecewise model of the configurational density of states of simple solids in the context of melting from the superheated state, as realized numerically in the Z-method via atomistic molecular dynamics. A first-order phase transition with metastable regions is reproduced by the model, being therefore useful to describe aspects of the melting transition. Within this model, transcendental equations connecting the superheating limit, the melting point, and the specific heat of each phase are presented and numerically solved. Our results suggest that the essential elements of the microcanonical Z curves can be extracted from simple modeling of the configurational density of states.

Original languageEnglish
Article number129198
JournalPhysica A: Statistical Mechanics and its Applications
Publication statusPublished - 1 Nov 2023


  • Density of states
  • Melting
  • Microcanonical
  • Phase Transitions
  • Superheating
  • Z method

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability


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