Singularities of the temperature dependence of threshold voltages in nematic liquid crystals
Vistin L.K. , Chistyakov I.G. , Chumakova S.P. , Parkhomenko V.V.
The difference between the domains produced in alternating and constant electric fields is revealed for the first time. It is shown that the threshold intensity of a constant electric field depends little on the temperature, so that domains can be observed in the entire temperature range. A photograph is presented of the domains existing at t = — 60°C. In an alternating field, at definite frequencies, the threshold rises rapidly with decreasing temperature and no domains appear in nematics below these temperatures.