Ferroelectric phase transitions from first principles

Karin Rabe, U. V. Waghmare

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

An effective Hamiltonian for the ferroelectric transition in PbTiO3 is constructed from first principles density-functional-theory total-energy and linear-response calculations through the use of a localized, symmetrized basis set of 'lattice Wannier functions'. Preliminary results of Monte Carlo simulations for this system show a first-order cubic-tetragonal transition at 660 K. The involvement of the Pb atom in the lattice instability and the coupling of local distortions to strain are found to be particularly important in producing the behavior characteristics of the PbTiO3 transition. Factors affecting the distribution of local distortions above Tc are discussed. Further applications of this method to a variety of systems and structures are proposed for the first principles study of finite temperature structural properties in individual materials.

Original languageEnglish (US)
Pages (from-to)1397-1403
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume57
Issue number10
DOIs
StatePublished - Oct 1996

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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