Incommensurate Smectic Phases?

Nonexistence of incommensurate smectic-A phases in binary mixtures of 8OBCAB and DB8OCN.

Correct Phase-Diagrams of Liquid-Crystals Reported To Exhibit the (Nonexistent) Incommensurate Smectic-A Phases

Three different incommensurate phases predicted by the phenomenological theory of frustrated smectics were reportedly found in mixtures of DB80CN and 80BCAB and DB,OCN and 80CB. The results of our high-resolution X-ray diffraction study of these materials show that these phases are, indeed, coexistences of two or more smectic-A phases. The correct phase diagrams of the two systems are found to ...

Biaxial Smectic Phases

Biaxial Smectic Banana Phases

Amorphous structures and incommensurate phases

2014 A comparison is made between incommensurate phases related with the well known Frendel-Kontorova problem, and amorphous structures, on the basis of a problem of conflict between different symmetries. This similarity leads to a fruitful comparison of solutions with the introduction of a 3-dimensional devil’s staircase for the characterization of amorphous structures. Finally for amorphous s...