Effects of Weak Anchoring on C1 and C2 Chevron Structures
نویسنده
چکیده
We present a theoretical study of the effect of weak anchoring on the transition between C1 and C2 chevron structures in smectic C liquid crystals. We employ a continuum theory which allows for variable cone, azimuthal and layer tilt angles. Equilibrium profiles for the director cone and azimuthal angles in the C1 and C2 states are calculated from the standard Euler-Lagrange minimisation of the total energy of the system. By comparing the total energies of the C1 and C2 states we can determine the globally stable chevron profile and calculate the critical temperature for the C1-C2 transition, which depends on anchoring strength and pretilt angle variations.
منابع مشابه
How to Achieve Zigzag Free Sm-C * State with a Low Pretilt Angle: A Numerical Calculation
One of the most notorious problems with ferroelectric liquid crystal is obtaining zigzag free bistable devices. By investigating the balance between surface azimuthal anchoring energy and bulk elastic energy within the confined chevron layer geometry of C1 and C2, we propose that it is possible to get a zigzag free C1 state by low azimuthal anchoring alignment at a low pretilt angle. The critic...
متن کاملDirector Structures in a Chiral Nematic Slab: Threshold Field and Pitch Variations
Abstract The liquid crystal director distribution is determined for a confined chiral nematic slab. The molecular director distribution of the field-controlled chiral nematic slab is directly calculated. The director profiles for the tilt and the twist angles, under different applied fields, are calculated in the slab with weak boundary conditions. Then, the dependence of the threshold field on...
متن کاملمطالعه تأثیر روشهای مختلف کوددهی بر عملکرد و اجزای عملکرد عدس در شرایط اقلیمیخرمآباد
The effects of fertilization methods on seed yield and yield components of lentil (lens culinaris cv. Gachsaran) were evaluated in the research field of College of Agriculture of Lorestan University during 2009. The experiment was conducted on the basis of a randomized complete block design with three replications. Treatments included three levels of chemical fertilizer, triple super phosphate ...
متن کاملتاثیر روشهای مختلف کوددهی بر درصد پروتئین، فسفر و عملکرد دانه عدس (Lens culinaris Medic.) در شرایط اقلیمی خرم آباد
Reduction of chemical fertilizer consumption in the production of agricultural products, using bio-fertilizers as a suitable substitution or complementary for chemical fertilizers has privileges from ecology and economical aspects. The advantages of applying of bio-fertilizer are providing plant with different nutrients in accordance to the natural ability of plant, enhancing and improving soil...
متن کاملFabio Maccheroni When an Event Makes a Difference
For (S, ) a measurable space, let C1 and C2 be convex, weak∗ closed sets of probability measures on . We show that if C1 ∪ C2 satisfies the Lyapunov property, then there exists a set A ∈ such that minμ1∈C1 μ1(A)>maxμ2∈C2 μ2(A). We give applications to Maxmin Expected Utility (MEU) and to the core of a lower probability.
متن کامل