Short pitch structures in smectics with interactions over more than two layers
Cepic, Mojca · Rovsek, Barbara · Zeks, Bostjan
Original · EN
Phenomenological model of chiral polar smectics is introduced with interactions up to the fourth neighboring layers. The minimization of the free energy gives three stable structures: the ferroelectric Sm C* phase, the antiferroelectric Sm C*ₐ phase and the hellicoidally modulated structure of the Sm C*ₕ phase. The phase Sm C*α can be recognized as the Sm C*ₕ phase below Sm A phase and as the Sm C*FI2 phase or as the Sm C*FI1 phase when appearing between the Sm C* phase and the Sm C*ₐ phase. Stability of these phases is analyzed and the phase diagram in the space of model parameters is presented.
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