[PDF] Dynamics And Defects In Liquid Crystals eBook

Author : Peter Palffy-Muhoray
Publisher : Routledge
Page : 480 pages
File Size : 47,20 MB
Release : 2022-02-15
Category : Science
ISBN : 1351454250

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During his distinguished scientific career, Alfred Saupe made important contributions to liquid crystal research, laying the groundwork on which much of the current knowledge and research in the physics of liquid crystals is based. This volume features papers presented by Prof. Saupe's colleagues, students and friends at a festschrift in honor of his 70th birthday. In addition, a selection of Prof. Saupe's articles are reprinted in the original German and in English translation, offering the reader a unique opportunity to see both the early work of this important scientist and widespread effect of that work on later discoveries in liquid crystal physics.

Author : Patricia Cladis
Publisher : CRC Press
Page : 490 pages
File Size : 49,89 MB
Release : 1998-08-27
Category : Science
ISBN : 9789056996499

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During his distinguished scientific career, Alfred Saupe made important contributions to liquid crystal research, laying the groundwork on which much of the current knowledge and research in the physics of liquid crystals is based. This volume features papers presented by Prof. Saupe's colleagues, students and friends at a festschrift in honor of his 70th birthday. In addition, a selection of Prof. Saupe's articles are reprinted in the original German and in English translation, offering the reader a unique opportunity to see both the early work of this important scientist and widespread effect of that work on later discoveries in liquid crystal physics.

Author : Oleg D. Lavrentovich
Publisher : Springer Science & Business Media
Page : 356 pages
File Size : 33,40 MB
Release : 2012-12-06
Category : Science
ISBN : 9401005125

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Topological defects are the subject of intensive studies in many different branches of physics ranging from cosmology to liquid crystals and from elementary particles to colloids and biological systems. Liquid crystals are fascinating materials which present a great variety of these mathematical objects and can therefore be considered as an extremely useful laboratory for topological defects. This book is the first attempt to present together complementary approaches to the investigations of topological defects in liquid crystals using theory, experiments and computer simulations.

Author : Yuriy M. Bunkov
Publisher : Springer Science & Business Media
Page : 388 pages
File Size : 29,29 MB
Release : 2012-12-06
Category : Science
ISBN : 9401141061

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Topological defects formed at symmetry-breaking phase transitions play an important role in many different fields of physics. They appear in many condensed-matter systems at low temperature; examples include vortices in superfluid helium-4, a rich variety of defects in helium-3, quantized mag netic flux tubes in type-II superconductors, and disclination lines and other defects in liquid crystals. In cosmology, unified gauge theories of particle interactions suggest a sequence of phase transitions in the very early uni verse some of which may lead to defect formation. In astrophysics, defects play an important role in the dynamics of neutron stars. In 1997 the European Science Foundation started the scientific network "Topological defects" headed by Tom Kibble. This network has provided us with a unique opportunity of establishing a collaboration between the representatives of these very different branches of modern physics. The NATO-ASI (Advanced Study Institute), held in Les Houches in February 1999 thanks to the support of the Scientific Division of NATO, the European Science Foundation and the CNRS, represents a key event of this ESF network. It brought together participants from widely different fields, with diverse expertise and vocabulary, fostering the exchange of ideas. The lectures given by particle physicists, cosmologists and condensed matter physicists are the result of the fruitful collaborations established since 1997 between groups in several European countries and in the U.S.A.

Author : G.R. Luckhurst
Publisher : Springer Science & Business Media
Page : 612 pages
File Size : 32,17 MB
Release : 2012-12-06
Category : Science
ISBN : 9401111685

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Liquid-crystalline phases are now known to be formed by an ever growing range of quite diverse materials, these include those of low molecular weight as well as the novel liquid-crystalline polymers, such phases can also be induced by the addition of a solvent to amphiphilic systems leading to lyotropic liquid crystals. Irrespective of the structure of the constituent molecules these numerous liquid-cl)'Stailine phases are characterised by their long range orientational order. In addition certain phases exhibit elements of long range positional order. Our understanding, both experimental and theoretical, at the molecular level of the static behaviour of these fascinating and important materials is now well advanced. In contrast the influence of the long range order; both orientational and positional, on the molecular dynamics in liquid Cl)'Stais is less well understood. In an attempt to address this situation a NATO Advanced Study Institute devoted to liquid ctystal dynamics was held at n Ciocco, Barga, Italy in September 1989. This brought together experimentalists and theoreticians concerned with the various dynamical processes occurring in all liquid crystals. The skills of the participants was impressively wide ranging; they spanned the experimental techniques used in the study of molecular dynamics, the nature of the systems investigated and the theoretical models employed to understand the results. While much was learnt it was also recognised that much more needed to be done in order to advance our understanding of molecular dynamics in liquid Cl)'Stais.

Author : Xingzhou Tang
Publisher :
Page : 0 pages
File Size : 25,18 MB
Release : 2020
Category : Liquid crystals
ISBN :

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The structure and dynamics of topological defects are important features of liquid crystals. This doctoral dissertation research has focused on the geometry and dynamics of defects by regarding them as particles. We can describe defects by tensors and study their dynamics macroscopically. We find that a minimization principle can be applied to certain systems, and thus we get an alternate way to understand fluid flow and largely simplify the simulation. I will also show that in passive systems, the difference of Frank constants introduces extra torque for the defect, and in active systems, the activity gradient aligns the defects like an electric field is acting on dipoles.