Nematic director with defects
Rotational interaction of topological defects in planar nematic liquid crystals.
... 2.1 Nematic director field Nematic liquid crystals consist out of rod-like molecules with a cylindrical sym- ...the nematic orientation n as the average orientation of the molecules within a ...
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Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... in nematic director fields [83, ...the defects we can expect in smectics on more general curved substrate shapes but also into the peculiar effects on smectic layers of sharp edges and conical points ...
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Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... in nematic director fields [83, ...the defects we can expect in smectics on more general curved substrate shapes but also into the peculiar effects on smectic layers of sharp edges and conical points ...
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Oriental properties of nematic disclinations.
... While in this article we have laid down the first fun- damental concepts of the orientational mechanics of ne- matic disclinations, much is still to be understood. Both in passive and active nematics, the strong ...
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Woven nematic defects, skyrmions, and the Abelian sandpile model
... the director field configu- ration n. The nematic is symmetric under n → −n, whereas the Skyrmion charge changes sign, so that any expression for the energy of the system must be sym- metric under ψ → ...
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Vortex formation and dynamics of defects in active nematic shells
... active nematic liquid crystal with an arbitrary configuration of ...by defects in the director lead to the formation of stable vortices, analogous to those seen in confined systems in flat geometries, ...
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Nematic liquid crystal director structures in rectangular regions
... of nematic liquid crystal subject to weak anchoring on the sides of the ...analyze nematic equilibria in the well without the need to exclude point defects at the corners, as done in previous work in ...
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The Deformations of Thin Nematic Elastomer Sheets
... of nematic elastomer sheets described by nonisometric ...conical defects by Ware et ...through-thickness director orientation via twisted nematic ...
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Spherical nematic shells with a threefold valence
... Rotating this director field over an angle α yields the same free energy in the one-constant approximation. The splay texture (Fig. 3) corresponds to α = π/2. We note that the escape in the third dimension, in ...
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Stabilising the tetrahedral defect configuration in nematic shells
... ‘thick’ nematic shell behaviour was observed (see, for example, ...escaped defects occured, where the director field becomes parallel to the surface normal within the nematic ...
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Monte Carlo simulations of confined nematic systems
... chiral nematic shells in which the pitch length is shorter than both the droplet radius and shell thickness may indicate a transition analogous to that seen in filled chiral droplets from the twisted bipolar ...
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Ordering of ferromagnetic nanoparticles in nematic liquid crystals
... a nematic liquid ...crystal director. If the magnetic field is directed parallel to the director, zigzag chains are ...between defects formed in the close vicinity of colloidal inclusions in ...
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Forces between elongated particles in a nematic colloid
... the defects change their positions. The vector between the defects belonging to the same particle tilts with re- spect to the ...the defects can switch between two equivalent configurations during ...
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Propagating director bend fluctuations in nematic liquid crystals
... The parameter α appears in the continuum theory of switching phenomena, such as the homeotropic to planar-bend Freedericksz transition (see e.g. Chapter 5 of Ref. [3]). The influence of small values of α on backflow and ...
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Colloquium : disclination loops, point defects, and all that in nematic liquid crystals
... quences. Defects in a nematic liquid crystal, as in any ordered medium, are places where the order changes dis- continuously and is thus ...uniaxial nematic, a system that turns out not to be as ...
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Cross-talk between topological defects in different fields revealed by nematic microfluidics
... Topological defects are singularities in material fields that play a vital role across a range of systems: from cosmic microwave background polarization to superconductors and biological mate- ...topological ...
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A New Solution for the Director Relaxation Problem in Twisted Nematic Film Based on Wavelet Analysis
... The criterion for relaxation of a director was chosen in the form: ε |Φτ s1 − Φτ s | ≤ 10 −4 . In other words, if the azimuthal angle between two time steps is less than ε, then the algorithm stops. It is worth ...
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Core structure and non Abelian reconnection of defects in a biaxial nematic spin 2 Bose Einstein condensate
... We calculate the energetic structure of defect cores and propose controlled methods to imprint a nontrivially entangled vortex pair that undergoes non-Abelian vortex reconnection in a biaxial nematic spin-2 ...
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Biaxial order and a rotation of the minor director in the nematic phase of an organo siloxane tetrapode by the electric field
... The minor director does not rotate uniformly with an increase in the electric field. Initially, the electric field destroys an ex- isting order and then builds up the order of the minor axes in the direction of ...
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Drag on particles in a nematic suspension by a moving nematic isotropic interface
... A range of problems similar to those of polymer dis- persed liquid crystals also arise in nematic colloidal dis- persions. The nematic ordering makes it difficult to sus- pend small particles in a liquid ...
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