Weak crystallisation theory of the A1-$\tilde{\rm A}$ and A1-$ \tilde{\rm C}$ phase transitions

sodium nitrate structure... For model I, it is well known [15] in case of large rotational temperature factors that the fitting procedure gives too small a value

amplitude modes in the biaxial phase mix the components of biaxiality and birefringence of the order parameter, the critical (quasi-biaxial) mode presenting

We analyse it by a simple model taking into account the critical amplitude, the local phase of the modulation wave and the spectral densities of their

2014 We present results concerning sample dependence of not only the modulation wave vector, but also of the amplitude of the order parameter describing the N

temperature. This quantity can serve as small para- meter in the expansion of the thermodynamic potential. The irreducible representations with the help of which M&, T) is

Blue Phases I and II, occurring ina small temperature range between an isotropic and a cholesteric phase, have cubic structures with lattice constants of the order of wavelength

In this Appendix, we briefly review the theory of the de SQUID in so far as it concems the effects of trie intrinsic phase shift in YBCO-Pb SQUIDS. We wiii assume that in zero

X-ray studies of the smectic C phase and transitions between ˜ reentrant nematic, smectic A1, AD and C phases in binary mixtures of polar mesogens...