Research Data Leeds Repository

Citation

Nikkhou, Maryam and Gleeson, Helen and Muševič, Igor (2018) Dataset associated with Creation and topological charge switching of defect loops on a long fibre in the nematic liquid crystal dataset. University of Leeds. [Dataset] https://doi.org/10.5518/401

Dataset description

We demonstrate new type of topological defects on a homeotropic fibre aligned perpendicular to the nematic director in a planar nematic cell. Contrary to expectations we can create defect loops which are encircling the fibre along its short axis and are strongly tilted with respect to the fibre. Such loops are always accompanied by two topological solitons, which emanate from the loop and propagate to the left and right hand side of the fibre. Unlike previously reported closed loops of either positive and negative charge, encircling the fibre parallel to the nematic director, these loops can carry either positive or negative charge, or can be charge neutral and very stable. We show how to switch the charge of individual loops from positive to neutral and negative charge by adding unit monopoles of appropriate topological charge. We demonstrate new type of interaction of dipolar colloids with these new topological entities on a fibre.

Keywords:	Microconfined liquid crystals, topological defect;, homeotropic fibre, colloidal interaction, entanglement, anchoring,liquid-solid interfaces
Subjects:	F000 - Physical sciences > F300 - Physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://doi.org/10.1080/02678292.2018.1500653 Publication https://eprints.whiterose.ac.uk/134310/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	09 Nov 2018 12:58
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/447
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Nikkhou, Maryam https://orcid.org/0000-0003-4475-3154 University of Leeds https://ror.org/024mrxd33 ror Gleeson, Helen https://orcid.org/0000-0002-7494-2100 University of Leeds https://ror.org/024mrxd33 ror Muševič, Igor https://orcid.org/0000-0002-0200-1766 Jozef Stefan Institute https://ror.org/05060sz93 ror University of Ljubljana https://ror.org/05njb9z20 ror Type of data: Dataset Research funders: University of Leeds, The Slovenian Research Agency (ARRS) Publication date: 2018 Resource language: English Metadata language: English Publisher: University of Leeds Contact email: M.Nikkhou@leeds.ac.uk Last Modified: 02 Sep 2024 14:57

Files

Documentation

Readme [934B] Readme [934B] Readme [934B] Security: Anyone File name: Readme.txt Content type: Documentation Mime-Type: text/plain License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 934B

Data

Creation of charge-neutral and -1 defect rings [256kB] Creation of charge-neutral and -1 defect rings [256kB] Creation of charge-neutral and -1 defect rings [256kB] Security: Anyone File name: Supplementary_Movie1.wmv Content type: Data Description: The fibre is oriented perpendicular to the nematic director in a planar cell. Using optical tweezers the loop can be manipulated such that it is cut and split into two separate defect loops encircling the short axis of the fibre. Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 256kB

Topological diversity of defects that could be created around the fibre [298kB] Topological diversity of defects that could be created around the fibre [298kB] Topological diversity of defects that could be created around the fibre [298kB] Security: Anyone File name: Supplementary_Movie2.wmv Content type: Data Description: By quenching the NLC around the soliton, a charge-neutral loop along fibre short axis, a −1 point defect and a + 1 loop are created. The videos can be downloaded from dataset. Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 298kB

Pair of defect ring around the fibre in homeotropic nematic liquid crystal cell [327kB] Pair of defect ring around the fibre in homeotropic nematic liquid crystal cell [327kB] Pair of defect ring around the fibre in homeotropic nematic liquid crystal cell [327kB] Security: Anyone File name: Supplementary_Movie3.wmv Content type: Data Description: A pair of +1 and −1 loops are created, encircling the fibre along its shorter axis. Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 327kB

Charge-neutral loop and oppositly charged point monopoles [439kB] Charge-neutral loop and oppositly charged point monopoles [439kB] Charge-neutral loop and oppositly charged point monopoles [439kB] Security: Anyone File name: Supplementary_Movie4.wmv Content type: Data Description: A combination of point monopoles and chargedneutral loop can also be created on the soliton. Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 439kB

Switching the topological charge sign in homeotropic cell [333kB] Switching the topological charge sign in homeotropic cell [333kB] Switching the topological charge sign in homeotropic cell [333kB] Security: Anyone File name: Supplementary_Movie5.wmv Content type: Data Description: Switching the topological charge sign of disclination loop on a fibre in homeotorpic nematic liquid crystal cell from neutral to negatice and from negative to neutral. Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 333kB

Switching the topological charge sign from neutral to negative [269kB] Switching the topological charge sign from neutral to negative [269kB] Switching the topological charge sign from neutral to negative [269kB] Security: Anyone File name: Supplementary_Movie6.wmv Content type: Data Description: Switching the topological charge sign of disclination loop from neutral to negative on a fibre in planar nematic liquid crystal cell Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 269kB

Switching the topological charge sign from negative to neutral [311kB] Switching the topological charge sign from negative to neutral [311kB] Switching the topological charge sign from negative to neutral [311kB] Security: Anyone File name: Supplementary_Movie7.wmv Content type: Data Description: Switching the topological charge sign of disclination loop from negative to neutral on a fibre in planar nematic liquid crystal cell Mime-Type: video/x-ms-wmv License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 311kB