Anomalous elasticity of nematic elastomers

Details Anomalous elasticity of nematic elastomers Anomalous elasticity of nematic elastomers

2002-12-11

arxiv.org/abs/cond-mat/0212251v1

Europhys. Lett. 61, 776 (2003)

Physics

Condensed Matter

Soft Condensed Matter

4 pages

Scientific paper

10.1209/epl/i2003-00301-2

We study the anomalous elasticity of nematic elastomers by employing the powers of renormalized field theory. Using general arguments of symmetry and relevance, we introduce a minimal Landau-Ginzburg-Wilson elastic energy for nematic elastomers. Performing a diagrammatic low temperature expansion, we analyze the fluctuations of the displacement fields at and below the upper critical dimension 3. Our analysis reveals an anomaly of certain elastic moduli in the sense that they depend on the length scale. In $d = 3$ this dependence is logarithmic and below $d=3$ it is of power law type with anomalous scaling exponents. One of the 4 relevant shear moduli vanishes at long length scales whereas the only relevant bending modulus diverges.

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