Frequency Behavior of the Second-Sound Damping in the Smectic-APhase of Octylcyanobiphenyl: Evidence for the Divergence of Viscosities

Abstract
The breakdown of hydrodynamics predicted by Mazenko, Ramaswamy, and Toner is verified by experiments which use the excitation of second-sound resonances in the smetic-A phase of octylcyanobiphenyl. One finds a diverging viscosity Δη̃(5×106P s)ω, which has an order of magnitude comparable with the crude predictions of the theory.