Comment on ''Minimal Surfaces, Screw Dislocations, and Twist Grain Boundaries''

Details Comment on ''Minimal Surfaces, Screw Dislocations, and Twist Grain Boundaries'' Comment on ''Minimal Surfaces, Screw Dislocations, and Twist Grain Boundaries''

1999-10-22

arxiv.org/abs/cond-mat/9910350v1

Physics

Condensed Matter

Soft Condensed Matter

1pages, RevTex

Scientific paper

In a recent letter, (Phys. Rev. Lett. 82, 2892(1999); cond-mat/9808306) Kamien and Lubensky calculated the energy of the surface constructed via a linear superposition of screw dislocations in SmA phase, and obtained the positive (repulsive) sign of the long-range interaction between dislocations. We would like to object that this interaction is attractive. This conclusion can be important to explain the discontinuity of the TGB - SmA phase transition in chiral liquid crystals.

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