The Smectic $A$-$C$ Phase Transition in Biaxial Disordered Environments
  We study the smectic $A$-$C$ phase transition in biaxial disordered environments, e.g. fully anisotropic aerogel. We find that both the $A$ and $C$ phases belong to the universality class of the "XY Bragg glass", and therefore have quasi-long-ranged translational smectic order. The phase transition itself belongs to a new universality class, which we study using an $\epsilon=7/2-d$ expansion. We find a stable fixed point, which implies a continuous transition, the critical exponents of which we calculate. 
Leiming Chen (College of Science, The China University of Mining and   Technology, Xuzhou, Jiangsu, P. R. China), John Toner...
cond-mat.soft