We summarize the results of high resolution X-ray and light scattering studies of the smectic A-nematic transition in cyanobenzylidene-octyloxyaniline, octyloxy-cyanobiphenyl, and octyl-cyanobiphenyl. Pretransitional behavior in the nematic phase is essentially consistent with the He4 analogue proposed by de Gennes with subtle effects arising from the lack of true long range order in the smectic phase. Elastic constants in the smectic phase show anomalous behavior probably associated with the logarithmically divergent phase fluctuations.
Litster, J. D., Als-Nielsen, J. A., Birgeneau, R. J., Dana, S. S., Davidov, D., Garcia-Golding, F., Kaplan, M., Safinya, C. R., & Schaetzing, R. (1979). High Resolution X-Ray and Light Scattering Studies of Bilayer Smectic A Compounds. J. Phys. Colloques, 40(3), 339-344. https://doi.org/10.1051/jphyscol:1979366