How to couple Landau theory to an equation of state.

Phys Rev Lett

Institut für Experimentalphysik, Universität Wien, Strudlhofgasse 4, A-1090 Wien, Austria.

Published: February 2002

AI Article Synopsis

  • This study presents a method to build a Landau-type free energy that integrates a main order parameter with finite strain, using an elastic energy sourced from any given equation of state.
  • The approach allows for a broad and effective analysis of phase transformations in various materials, especially under extremely high pressure conditions.
  • This framework enhances the understanding of material behavior during phase changes, making it valuable for research in materials science.

Article Abstract

We show how to construct a Landau-type free energy based on a primary order parameter coupled to finite strain with an elastic energy derived from an arbitrary equation of state V = V(P). The resulting class of models provides an excellent and efficient framework for the systematic study of phase transformations for a wide range of materials up to ultrahigh pressures.

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http://dx.doi.org/10.1103/PhysRevLett.88.055503DOI Listing

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