PHASE DIAGRAMS OF CHOLESTERICS IN APPLIED FIELDS : THE TWO-DIMENSIONAL HEXAGONAL PHASE

Dark olive green void squares correspond to the spin length of the first layer, maroon void triangles to that of the second, red circles to the third, indigo triangles to the

2014 By means of static and hydrodynamic theories, we study the rotary motion of the molecules in a cholesteric slab (of given thickness and strong anchored surfaces),

These three sets (see Table VI) fit the temperature dependence of the transverse period but they give different results for the order parameter amplitudes and

Let us recall that one column formed of regularly spaced molecules will give a diffraction pattern, the intensity of which is localized on parallel regularly

On the contrary, in a finite medium, the stress field of the dislocation depends on its position in this medium and so does the electric energy of interaction,

Here we consider a defect as a singular curve which sep- arates the parts of a plate consisting of different phases that means, we consider the equilibrium of plates made of

In cholesteric liquid crystals with a short enough pitch, the transition from the isotropic liquid phase (I.L.) to the usual helicoidal phase (C) is mediated by

In recent experiments [9] on BPI and BPII, an intensity change and a shift of diffraction bands were observed at a constant (« frozen ») size of the unit cell just as.. assumed for