Randall D Kamien and Jonathan V Selinger 2001 J. Phys.: Condens. Matter 13 R1 doi:10.1088/0953-8984/13/3/201
Randall D Kamien1 and Jonathan V Selinger2
Show affiliationsThis article reviews the complex ordered structures induced by chirality in liquid crystals. In general, chirality favours a twist in the orientation of liquid-crystal molecules. In some cases, as in the cholesteric phase, this favoured twist can be achieved without any defects. More often, the favoured twist competes with applied electric or magnetic fields or with geometric constraints, leading to frustration. In response to this frustration, the system develops ordered structures with periodic arrays of defects. The simplest example of such a structure is the lattice of domains and domain walls in a cholesteric phase under a magnetic field. More complex examples include defect structures formed in two-dimensional films of chiral liquid crystals. The same considerations of chirality and defects apply to three-dimensional structures, such as the twist-grain-boundary and moiré phases.
61.30.Mp Blue phases and other defect-phases
61.30.Gd Orientational order of liquid crystals; electric and magnetic field effects on order
Issue 3 (22 January 2001)
Received 11 September 2000, in final form 28 November 2000
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