Smectic C* and Smectic A*de Vries Phases
Experimental demonstration, using polarized Raman and infrared spectroscopy that both conventional and de Vries smectic A phase may exist in smectic liquid crystals with a first order A C* transition
... homogeneously aligned cell using a polarizer in this part of the IR experiment. The transition moment under consider- ation is again for the phenyl stretching band. A uniform do- main emerges for the SSFLC state as only ...
11
On the orientational distribution functions in de Vries-type smectic liquid crystals
... In de Vries smectic liquid crystals the transition from the orthogonal smectic A (SmA) to the tilted smectic C (SmC) phase occurs with essentially no decrease in smectic ...
15
Theory of the intermediate tilted smectic phases and their helical rotation
... the de Vries’s phases arise instead of the three phases mentioned ...three smectic layers appears to be the broadest in the temperature ...
17
Electric field dependent dielectric response in the de Vries type smectic A* phase possessing local orientational order with nanoscale correlation length
... from smectic-A * 共SmA * 兲 to smectic-C * 共SmC * 兲 or smectic-C A * 共SmC A * 兲 phase, the layer shrinkage along with the surface anchoring of the molecules lead to the formation of ...
5
Optical rotatory power, biaxiality and the models of the chiral tilted smectic phases
... tilted phases with the same value of the helical pitch, tilt angle, and the unit-cell-averaged dielectric tensor, will practically be the same when the smectic layer thickness 共 ...the de Vries’s ...
10
Anisotropy of the elastic constants in SmC* liquid crystal films
... a smectic film at the sur- face of an isotropic liquid crystal droplet, see for example Swanson et ...the smectic layers can also orientate uniformly under the influence of an applied electric field in the ...
9
Field induced transformations in the biaxial order of non tilted phases in a bent core smectic liquid crystal
... the dipoles and therefore the polar directors are randomly distributed as found in the literature [14,15]. On apply- ing an in-plane electric field, the dipoles gradually orient towards the field direction inducing ...
7
Fractal Growth of a Conventional Calamitic Liquid Crystal
... The phase ordering process at the iso–Sm-C transition was investigated by quenching the sample below the transi- tion temperature to a quench depth ⌬ T and recording polar- izing microscopic images as a function ...
8
Textural and conoscopic studies of chiral liquid crystals possessing cholestric - smectic A or cholesteric-TGB A - smectic A phase transitions
... D[LV c D[LV SDUDOOHO WR WKH VPHFWLFOD\HUV7KHERXQGDU\EHWZHHQ DGMDFHQW VODEVLVDWZLVWJUDLQERXQGDU\ 7*% PDGHRI SDUDOOHO HTXLGLVWDQW VFUHZ GLVORFDWLRQV RI WKH 6P$SKDVHZKLFKZHFDQWHUPYRUWH[OLQHVIRU WKH UHDVRQ RI WKH ...
11
Optical and electrical conductivity measurements of induced reentrant smectic phases of in ternary mixture of liquid crystalline materials
... cholesteric phases are slowly changed over to a well-defined focal conic fan-shaped texture, which is the characteristic of SmA phase and is shown in Figure ...
5
Comparison of the characteristics of the chiral analog of the de Vries type of smectic A* phase
... the de Vries type of SmA * phase but their behavior to the induced tilt angle 共 angular 兲 shift and dichroic ratio in the SmA * phase is ...the de Vries type of phases so far 关 3,4 兴 ...
6
Optical Birefringence Studies on Cholesteric and Induced Smectic Phases of Ternary Mixture of Liquid Crystalline Materials
... ABSTRACT: In the present work, our investigation is to study on the optical and thermal properties of multi- component system of Cholesteryl oleate (CO), Sodium oleate (Naol) and Glacial acetic acid (GAA). Mixtures of ...
5
Controlling Defects in Nematic and Smectic Liquid Crystals Through Boundary Geometry
... Here, we present a unique level of control to direct the growth of FCD arrays by inducing hierarchical assembly of multiple FCDs centered at the edges of micropillars with nonoverlapping elliptical focal curves. Below a ...
184
Minimality conditions for wave speed in anisotropic smectic C* liquid crystals
... a smectic layer, and our focus here is on examining how the presence of anisotropy can affect the speed of this ...Copyright c 0000 John Wiley & Sons, ...
16
Smectic layer instabilities in liquid crystals
... the smectic layer structure, as it is generally observed that the smectic layer compressibility is largely enhance at phase transitions from the cholesteric phase [58,59] ...
66
Annihilation of edge dislocations in smectic A liquid crystals
... With time the defects gradually enter the late pre-collision regime, shown in Figs.3a. Now the defect core structure of a defect seems to be influenced by the interaction with its neighbor. The order parameter profiles ...
27
Large electroclinic effect and stability of chiral smectic liquid crystals
... An electric field applied parallel to the layer of a smectic-A* Sm-A* liquid crystal induces a molecular tilt relative to the layer normal, called the electroclinic effect.. The electroc[r] ...
177
Effective long range interlayer interactions and electric field induced subphases in ferrielectric liquid crystals
... is originally ferrielectric 3-layer unit cells stabilized by the LRILIs, but with two consecutive blocks that would be modi- fied to become ferroelectric by an applied electric field. There are several theoretical ...
12
Computer simulation of confined liquid crystal dynamics
... temperature smectic phase, but the effect of periodic boundary conditions could invalidate analysis of any tilt produced on ...simulation, smectic layers can tilt in order to resolve a mismatch between the ...
229
Configuration of a smectic A liquid crystal due to an isolated edge dislocation
... mesomorphic phases of matter which are exhibited by materials consisting of anisotropic rod- or disc-like ...solid phases, and display physical properties reminiscent of ...of de Gennes and Prost ...
13