The mean field model with P-2 theta(2) coupling for the smectic A-smectic C* phase transition in liquid crystals

Using mean field theory with a P(2)theta (2) coupling term in the free energy expansion, we calculate the polarization as a function of temperature for the smectic A-smectic C* phase transition in a liquid crystalline material. Our calculated polarization values are in good agreement with the experimental data