Piezoelectricity of Cholesteric Elastomers

Details Piezoelectricity of Cholesteric Elastomers Piezoelectricity of Cholesteric Elastomers

1994-12-20

arxiv.org/abs/cond-mat/9412091v1

Physics

Condensed Matter

11 pages, 1 Postscript figure; Latex

Scientific paper

10.1051/jp2:1995163

We consider theoretically the properties of piezoelectricity in cholesteric elastomers. We deduce using symmetry considerations the piezoelectric contributions to the free energy in the context of a coarse-grained description of the material. In contrast to previous work we find that compressions or elongations of the material along the pitch axis do not produce a piezoelectric response, in agreement with fundamental symmetry considerations. Rather only suitable shear strains or local rotations produce a polarization. We propose some molecular mechanisms to explain these effects.

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