An efficient computational method for use in structural studies of crystals with substitutional disorder

Roberta Poloni, Jorge Íñiguez, Alberto García, Enric Canadell

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    8 Citations (Scopus)

    Abstract

    We present a computationally efficient semi-empirical method, based on standard first-principles techniques and the so-called virtual crystal approximation, for determining the average atomic structure of crystals with substitutional disorder. We show that, making use of a minimal amount of experimental information, it is possible to define convenient figures of merit that allow us to recast the determination of the average atomic ordering within the unit cell as a minimization problem. We have tested our approach by applying it to a wide variety of materials, ranging from oxynitrides to borocarbides and transition-metal perovskite oxides. In all the cases we were able to reproduce the experimental solution, when it exists, or the first-principles result obtained by means of much more computationally intensive approaches. © 2010 IOP Publishing Ltd.
    Original languageEnglish
    Article number415401
    JournalJournal of Physics Condensed Matter
    Volume22
    Issue number41
    DOIs
    Publication statusPublished - 20 Oct 2010

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