Semi-soft Nematic Elastomers and Nematics in Crossed Electric and Magnetic Fields
arXiv:0705.1666 · doi:10.1103/PhysRevLett.98.147801
Abstract
Nematic elastomers with a locked-in anisotropy direction exhibit semi-soft elastic response characterized by a plateau in the stress-strain curve in which stress does not change with strain. We calculate the global phase diagram for a minimal model, which is equivalent to one describing a nematic in crossed electric and magnetic fields, and show that semi-soft behavior is associated with a broken symmetry biaxial phase and that it persists well into the supercritical regime. We also consider generalizations beyond the minimal model and find similar results.
arXiv comment4 pages, 3 figures
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