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  • Competition between local disordering and global ordering fields in nematic liquid crystals [Elektronski vir]
    Cvetko, Matej, 1981- ; Ambrožič, Milan ; Kralj, Samo
    We study the influence of external electric or magnetic field B on orientational ordering of nematic liquid crystals or of other rod-like objects (e.g. nanotubes immersed in a liquid) in the presence ... of random anisotropy field type of disorder. The Lebwohl-Lasher lattice type of semi-microscopic approach is used at zero temperature. Therefore, results are valid well below the transition into the isotropic phase. We calculate the correlation function of systems as a function of B, concentration p of impurities imposing random anisotropy field disorder, the disorder strength W and system dimensionality (2D and 3D systems). In order to probe memory effects we calculate correlation length ▫$\xi$▫ for random and homogeneous initial configurations. We determine the crossover fields Bc(p) separating roughly the ordered and disordered regime. Memory effects are apparent only in the latter case, i.e. for B < Bc.
    Source: Beilstein journal of organic chemistry [Elektronski vir]. - ISSN 1860-5397 (Vol. 6, no. 2, 2010, str. 1-14)
    Type of material - e-article ; adult, serious
    Publish date - 2010
    Language - english
    COBISS.SI-ID - 17410312

    Link(s):

    http://dx.doi.org/10.3762/bjoc.6.2
    Digital Library of the University of Maribor – DLUM
    DOI

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