Topology and Nematic Ordering II: Observable Critical Behavior

Details Topology and Nematic Ordering II: Observable Critical Behavior Topology and Nematic Ordering II: Observable Critical Behavior

1995-01-22

arxiv.org/abs/cond-mat/9501100v1

Physics

Condensed Matter

10 pages, RevTeX 3.0

Scientific paper

10.1103/PhysRevE.52.1801

This paper is the second in a pair treating a new lattice model for nematic media. In addition to the familiar isotropic (I) and nematically ordered (N) phases, the phase diagram established in the previous paper (Paper I) contains a new, topologically ordered phase (T) occuring at large suppression of topological defects and weak nematic interactions. This paper (Paper II) is concerned with the experimental signatures of the proposed phase diagram. Specific heat, light scattering and magnetic susceptibility near both the N/T and I/T transitions are studied, and critical behavior determined. The singular dependences of the Frank constants ($K_1$, $K_2$, $K_3$) and the dielectric tensor anisotropy ($\Delta \epsilon$) on temperature upon approaching the N/T transition are also found.

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