| Title: | Competition between local disordering and global ordering fields in nematic liquid crystals |
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| Authors: | ID Cvetko, Matej (Author)
ID Ambrožič, Milan (Author)
ID Kralj, Samo (Author) |
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| Files: |  Beilstein_Journal_of_Organic_Chemistry_2010_Cvetko,_Ambrozic,_Kralj_Competition_between_local_disordering_and_global_ordering_fields_in.pdf (747,18 KB)
MD5: A9DA5DB75908F21F4199C3C270F59713
PID: 20.500.12556/dkum/00ab93b0-530a-43c0-bea6-8cef44e72af8
 http://www.beilstein-journals.org/bjoc/articles/6/2
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FNM - Faculty of Natural Sciences and Mathematics
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| Abstract: | 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. |
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| Keywords: | disorder, Imry-Ma theorem, liquid crystals, memory effect, orientational order |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 16.10.2009 |
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| Article acceptance date: | 15.12.2009 |
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| Publication date: | 07.01.2010 |
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| Year of publishing: | 2010 |
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| Number of pages: | str. 1-8 |
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| Numbering: | Letn. 6, št. 2 |
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| PID: | 20.500.12556/DKUM-35448  |
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| ISSN: | Y506-6603 |
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| UDC: | 620.1/.2 |
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| ISSN on article: | Y506-6603 |
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| COBISS.SI-ID: | 17410312 |
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| DOI: | 10.3762/bjoc.6.2 |
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| NUK URN: | URN:SI:UM:DK:8BLWAIT5 |
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| Publication date in DKUM: | 07.06.2012 |
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| Views: | 2076 |
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| Downloads: | 451 |
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| Metadata: |    |
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| Categories: | Misc.
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