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Twist-bend nematic phase in the presence of molecular chirality

Liquid Crystals, 2018
One of the interesting questions related to bent-shaped materials is how structural chirality of the twist-bend nematic (NTB) phase can respond to the presence of molecular chirality, with later being introduced through chiral centers incorporated in the
Lech Longa, Wojciech Tomczyk
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Twist as a Probe for Phase Structure

Physica Scripta, 1981
Summary: We advocate the use of twist as an efficient tool, in computer simulated lattice gauge theories, for quick scan of phase diagrams and for determining phase structure. Physically, a twist is an excitation induced by a specific dislocation (`twisted boundary condition') in the system.
Groeneveld, J., Jurkiewicz, J., Korthals-Altes, C. P.   +2 more
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Quasicrystallinity in twist-grain-boundary phases

Physical Review Letters, 1991
We present a simplified polymer model for twist-grain-boundary phases in liquid crystals. The thermodynamic phases or this model are characterized by an angle 2πα. There are incommensurate phases with a an irrational number and commensurate phases with α=P/Q, with P and Q relatively prime integers. The latter have quasicrystalline symmetry for Q=5 or Q>
, Lubensky, , Tokihiro, , Renn
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Geometric phases in twisted strips

Physics Letters A, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Satija, Indubala I., Balakrishnan, Radha
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Helical Twisting Power of Induced Twisted Smectic C* Phases

Berichte der Bunsengesellschaft für physikalische Chemie, 1987
AbstractThe helically structured cholesteric and smectic C* phases have been induced by chiral guest molecules in liquid crystalline host systems exhibiting nematic as well as Scphases. The helical twisting power δ has been measured for those systems: i) In all cases values of δchol> δc*were obtained; ii) in the induced Sc* but not in the ...
H. Stegemeyer, H.‐J. Kersting, W. Kuczynski   +2 more
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Observation of a Reentrant Twist Grain Boundary Phase

Physical Review Letters, 2001
Physical Review ...
D S, Shankar Rao, S, Krishna Prasad, V N, Raja, C V, Yelamaggad, S, Anitha Nagamani   +4 more
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Investigation of a Twisted Phase between the Cholesteric and the Smectic A Phase

Crystal Research and Technology, 1996
AbstractIn a ternary mixture of two liquid crystals and a non‐mesomorphic chiral dopant an intermediate state with an unusual texture was found between the cholesteric and the SA phase which could be identified as a separate twisted mesophase. The reflection wavelength of this mesophase does not change with temperature whereas the transmission of ...
A. Chanishvili, G. Chilaya, G. Petriashvili, M. Neundorf, G. Pelzl   +4 more
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The five-phase twisted-ring counter circuit

10th IEEE International Conference on Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003, 2004
The behavior of the Five-Phase Twisted-Ring Counter (5P-TRC) circuit is analyzed. The circuit produces five individual phased clock signals that exercise a phase difference equal to the half period of the clock. A tree-like structure is built by applying the phased outputs of the circuit to the clock inputs of five replicas of the circuit in order to ...
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Liquid crystal phase shifters with a twist

Applied Physics Letters, 2013
The phase-shift per unit-length of microwave radiation passing through a liquid crystal cell is calculated. By using twisted nematics, as compared to the standard homogeneous nematic liquid crystal, the phase-shift per unit-length is increased over the transition region.
C. M. Karwin, K. L. Livesey
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On the Twisted Director Field of the Blue Phases

Europhysics Letters (EPL), 1993
We study the properties of special double-twist fields with toroidal symmetry on S3. The simplest case corresponds to the unfrustrated field tangent to the Hopf fibration. The excited states are labelled by an integral winding number m. For each value of m we derive a lower bound for the energy.
R Dandoloff, R Mosseri
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