Nematic-Smectic Transition in Spherical Shells
نویسندگان
چکیده
منابع مشابه
Nematic textures in spherical shells.
The equilibrium texture of nematic shells is studied as a function of their thickness. For ultrathin shells the ground state has four short 1/2 disclination lines but, as the thickness of the film increases, a three-dimensional escaped configuration composed of two pairs of half-hedgehogs becomes energetically favorable. We derive an exact solution for the nematic ground state in the one Frank ...
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The nematic to smectic A (NA) phase transition in liquid crystals has been a subject of extensive study in recent years. The original theories due to McMillan [ I] and de Gennes [ 21 suggested that this transition could be first or second order. De Gennes, using a Landau expansion of the smectic free energy, emphasized the coupling between the smectic or density order parameter, v and the nemat...
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Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan J-PARC Center, Tokai, Ibaraki 319-1195, Japan International Institute for Advanced Studies, Kizugawa, Kyoto 619-0225, Japan Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan & ERATO Multfierroics Project, JST, c/o University of Tokyo, Tokyo 113-8656, Japan Cross-Correlated Materi...
متن کاملCritical linear thermal expansion in the smectic-A phase near the nematic-smectic phase transition.
Recent high-resolution x-ray investigations of the smectic- A (SmA) phase near the nematic-to-SmA transition provide information about the critical behavior of the linear thermal expansion coefficient alpha// parallel to the director. Combining such data with available volume thermal expansion alpha(V) data yields the in-plane linear expansion coefficient alpha(perpendicular) . The critical beh...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2011
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.106.247802