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    On the use of symmetry in configurational analysis for the simulation of disordered solids

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    Access Status
    Open access
    Authors
    Mustapha, S.
    D'Arco, P.
    De La Pierre, Marco
    Noël, Y.
    Ferrabone, M.
    Dovesi, R.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Mustapha, S. and D'Arco, P. and De La Pierre, M. and Noël, Y. and Ferrabone, M. and Dovesi, R. 2013. On the use of symmetry in configurational analysis for the simulation of disordered solids. Journal of Physics: Condensed Matter. 25 (10): Article ID 105401.
    Source Title
    Journal of Physics: Condensed Matter
    DOI
    10.1088/0953-8984/25/10/105401
    ISSN
    0953-8984
    School
    Department of Applied Chemistry
    Remarks

    This is an author-created, un-copy edited version of an article accepted for publication in Mustapha, S. and D'Arco, P. and De La Pierre, M. and Noël, Y. and Ferrabone, M. and Dovesi, R. 2013. On the use of symmetry in configurational analysis for the simulation of disordered solids. Journal of Physics: Condensed Matter. 25 (10): Article ID 105401. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/0953-8984/25/10/105401

    URI
    http://hdl.handle.net/20.500.11937/7236
    Collection
    • Curtin Research Publications
    Abstract

    The starting point for a quantum mechanical investigation of disordered systems usually implies calculations on a limited subset of configurations, generated by defining either the composition of interest or a set of compositions ranging from one end member to another, within an appropriate supercell of the primitive cell of the pure compound. The way in which symmetry can be used in the identification of symmetry independent configurations (SICs) is discussed here. First, Pólya's enumeration theory is adopted to determine the number of SICs, in the case of both varying and fixed composition, for colors numbering two or higher. Then, De Bruijn's generalization is presented, which allows analysis of the case where the colors are symmetry related, e.g. spin up and down in magnetic systems. In spite of their efficiency in counting SICs, neither Pólya's nor De Bruijn's theory helps in solving the difficult problem of identifying the complete list of SICs. Representative SICs are obtained by adopting an orderly generation approach, based on lexicographic ordering, which offers the advantage of avoiding the (computationally expensive) analysis and storage of all the possible configurations. When the number of colors increases, this strategy can be combined with the surjective resolution principle, which permits the efficient generation of SICs of a problem in |R| colors starting from the ones obtained for the (|R| − 1)-colors case. The whole scheme is documented by means of three examples: the abstract case of a square with C4v symmetry and the real cases of the garnet and olivine mineral families.

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