Complex temperature dependence of the dielectric response in simple SmC* phases (CROSBI ID 322718)
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Jukić, Dina ; Čepič, Mojca
engleski
Complex temperature dependence of the dielectric response in simple SmC* phases
The system under study has a SmA* ↔ SmC* phase sequence, and is described by a basic phenomenological model. However, in contrast to a common approach, changes of the polarisation induced by the external electric field are considered independent of changes of the tilt. As a result, even in the basic model, which does not contain any additional terms usually used to obtain better fits to experimental observations, frequencies of the most of relaxation modes depend on the temperature non-linearly and their dielectric response is not inversely proportional to the frequency of the mode. The behaviour is a direct consequence of chiral piezoelectric coupling, which influences polar properties of the relaxation modes in dependence of the temperature.
Dielectric response ; Polar ; Smectic ; Liquid Crystal
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