Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Liquid Crystals
CPP 17.1: Topical Talk
Dienstag, 15. März 2011, 14:00–14:30, ZEU 114
Modulated mesophases: from labyrinths to liquid ferroelectric chords. — •Alexey Eremin1, Ulrike Kornek1, Ralf Stannarius1, Antal Jákli2, and Hideo Takezoe3 — 1Otto-von-Guericke Universität, IEP/ANP, 39106 Magdeburg — 2Liquid Crystal Institute, Kent State University, USA — 3Dept. of Organic and Polymeric Materials, Tokyo Institute of Technology, Japan
Competition between incompatible ground states often leads to frustration, which is manifested by spatially modulated states. This phenomenon can be found in various physical and chemical systems such as semiconductors, lipid membranes, ferrofluids, or superconductors. Here we show an example of a polarization modulated liquid crystal phase exhibiting a variety of fascinating structures. Those include labyrinths of layer dislocations in free-standing films and stable ferroelectric fibres with liquid-like order of molecules in cylindrically wrapped layers. Using non-linear optics and polarising microscopy we get insight into the internal organisation of the polar structure of the phase in different geometries as well as the mechanical properties the fibres.