Fluctuating Membranes with Tilt Order

Details Fluctuating Membranes with Tilt Order Fluctuating Membranes with Tilt Order

1995-04-19

arxiv.org/abs/cond-mat/9504073v1

Physics

Condensed Matter

13 pages; print this using plain TeX

Scientific paper

10.1051/jp2:1995206

Thermal fluctuations are important for amphiphilic bilayer membranes since typical bending stiffnesses can be a few $k_B T$. The rod-like constituent molecules are generically tilted with respect to the local normal for packing reasons. We study the effects of fluctuations on membranes with nematic order, a simplified idealization with the same novel features as realistic tilt order. We find that nematic membranes lie in the same universality class as hexatic membranes, {\it i.e.} the couplings that distinguish nematic from hexatic order are marginally irrelevant. Our calculation also illustrates the advantages of conformal gauge, which brings great conceptual and technical simplifications compared to the more popular Monge gauge.

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