P. Galatola et M. Rajteri, CRITICAL-NOISE MEASUREMENT NEAR FREEDERICKSZ TRANSITIONS IN NEMATIC LIQUID-CRYSTALS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 49(1), 1994, pp. 623-628
We present a dynamic light-scattering experiment on a planarly oriente
d nematic liquid crystal in the presence of a symmetry-breaking electr
ic field applied normally to the cell planes. This experiment gives di
rect evidence for the critical behavior of the lowest splay fluctuatio
n mode. A detailed theoretical analysis of the dynamics of this mode i
s worked out and compared with the experimental results.