Measurement of Coherence-Length Anisotropy in the Isotropic Phase of Nematics
- 22 December 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 35 (25), 1711-1714
- https://doi.org/10.1103/physrevlett.35.1711
Abstract
A phase-sensitive, differential, light-scattering method is used to measure the shape of correlated regions in the isotropic phase of nematics. In MBBA (-methoxybenzylidene -butylaniline) these regions are elongated along the molecular-axis direction and the critical behavior is close to that predicted by mean-field theory; de Gennes's parameter is positive. In the isotropic phase of the smectic OBBA (-octoxybenzylidene -butylaniline) the correlated regions are flat and cannot be described by a constant .
Keywords
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