کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5103417 | 1480106 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of diffusion limited aggregates of impurities on nematic ordering
ترجمه فارسی عنوان
تاثیر انبساط محدود ناخالصی در مرتب سازی غیرمستقیم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
چکیده انگلیسی
We study the impact of random bond-type disorder on two-dimensional (2D) orientational ordering of nematic liquid crystal (LC) configurations. The lattice Lebwohl-Lasher pseudospin model is used to model orientational ordering perturbed by frozen-in rod-like impurities of concentration p exhibiting the isotropic orientational probability distribution. The impurities are either (i) randomly spatially distributed or (ii) form diffusion limited aggregation (DLA)-type patterns characterized by the fractal dimensions df, where we consider cases dfâ¼1.7 and dfâ¼1.9. The degree of orientational ordering is quantified in terms of the orientational pair correlation function G(r). Simulations reveal that the DLA pattern imposed disorder has a significantly weaker impact for a given concentration of impurities. Furthermore, if samples are quenched from the isotropic LC phase, then the fractal dimension is relatively strongly imprinted on quantitative characteristics of G(r).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 467, 1 February 2017, Pages 249-256
Journal: Physica A: Statistical Mechanics and its Applications - Volume 467, 1 February 2017, Pages 249-256
نویسندگان
S. Harkai, M. AmbrožiÄ, S. Kralj,