| Title: | Reconfiguration of nematic disclinations in plane-parallel confinements |
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| Authors: | ID Harkai, Saša (Author)
ID Rosenblatt, Charles (Author)
ID Kralj, Samo (Author) |
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| Files: |  Harkai-2023-Reconfiguration_of_Nematic_Disclin.pdf (7,16 MB)
MD5: 4F116EDB704104D49F1B6532B01DAC63
 https://doi.org/10.3390/cryst13060904
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| Language: | English |
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| Work type: | Article |
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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 numerically the reconfiguration process of colliding |m|=1/2 strength disclinations in an achiral nematic liquid crystal (NLC). A Landau–de Gennes approach in terms of tensor nematic-order parameters is used. Initially, different pairs {m1,m2} of parallel wedge disclination lines connecting opposite substrates confining the NLC in a plane-parallel cell of a thickness h are imposed: {1/2,1/2}, {−1/2,−1/2} and {−1/2,1/2}. The collisions are imposed by the relative rotation of the azimuthal angle θ of the substrates that strongly pin the defect end points. Pairs {1/2,1/2} and {−1/2,−1/2} “rewire” at the critical angle θ(1)c=3π/4 in all cases studied. On the other hand, two qualitatively different scenarios are observed for {−1/2,1/2}. In the thinner film regime ℎ<ℎc, the disclinations rewire at θ(2)c=5π/4. The rewiring process is mediated by an additional chargeless loop nucleated in the middle of the cell. In the regime ℎ>ℎc, the colliding disclinations at θ(2)c reconfigure into boojum-like twist disclinations. |
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| Keywords: | liquid crystals, topological defects, disclinations, reconfiguration |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 20.04.2023 |
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| Article acceptance date: | 27.05.2023 |
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| Publication date: | 01.06.2023 |
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| Publisher: | MDPI |
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| Year of publishing: | 2023 |
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| Number of pages: | Str. 1-11 |
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| Numbering: | Letn. 13, Št. 6, št. članka 904 |
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| PID: | 20.500.12556/DKUM-87754  |
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| UDC: | 532.783 |
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| ISSN on article: | 2073-4352 |
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| COBISS.SI-ID: | 156823043 |
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| DOI: | 10.3390/cryst13060904 |
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| Publication date in DKUM: | 28.03.2024 |
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| Views: | 393 |
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| Downloads: | 46 |
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| Metadata: |    |
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| Categories: | Misc.
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