J. Phys. II France
Volume 7, Numéro 5, May 1997
Page(s) 743 - 750
DOI: 10.1051/jp2:1997156
J. Phys. II France 7 (1997) 743-750

Smectic Order in Double-Twist Cylinders

Randall D. Kamien

Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA

(Received 18 November 1996, revised 17 February 1997, accepted 27 February 1997)

I propose a double-twist texture with local smectic order, which may have been seen in recent experiments [1]. As in the Renn-Lubensky TGB phase, the smectic order is broken only through a lattice of screw dislocations. A melted lattice of screw dislocations can produce a double-twist texture as can an unmelted lattice. In the latter case I show that geometry only allows for certain angles between smectic regions. I discuss the possibility of connecting these double-twist tubes together to form a smectic blue phase.

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