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Physics of the Solid State

, Volume 59, Issue 4, pp 644–651 | Cite as

Short-range order and nonstoichiometry in titanium monoxide TiO y from DFT calculations

  • M. G. Kostenko
  • A. A. Rempel’
Metals

Abstract

Structural models of short-range order in the arrangement of structural vacancies have been proposed for stoichiometric and nonstoichiometric compositions of titanium monoxide TiO y . A combined effect of the short-range order and nonstoichiometry on the ground-state energy and the electronic structure of the compound has been investigated using the first-principles methods. The energetically favorable models of short-range order reproduce the local distribution of atoms and vacancies, which is characteristic of the Ti5O5(mon) and Ti5O5(cub) superstructures. In these models, the correlations between the vacancies of the metal sublattice and the vacancies of the nonmetal sublattice make a more significant contribution to the decrease in the energy of the compound as compared with the correlations between the vacancies in only one of the sublattices.

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Institute of Solid State Chemistry, Ural BranchRussian Academy of SciencesYekaterinburgRussia

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