期刊
EUROPHYSICS LETTERS
卷 56, 期 2, 页码 247-253出版社
E D P SCIENCES
DOI: 10.1209/epl/i2001-00513-x
关键词
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We propose that the natural tendency of banana-shaped mesogen molecules to induce a local bend of the nematic director can result in pathological elasticity, with negative bend elastic constant. Under this hypothesis, a simple Landau-like phenomenological model predicts a symmetry-breaking transition inside the nematic phase, from uniform textures toward spontaneous periodic distortion, either oscillating splay-bend or conical twist-bend helix. The predicted lower symmetry nematic phases are expected to show interesting polar properties, similar to those already reported for banana-shaped smectogens.
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