Premium
The goldstone mode of a liquid crystalline thiadiazole derivative
Author(s) -
Kresse H.,
Tschierske C.,
Linström B.,
Kremer F.,
Vallerien S. U.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170251222
Subject(s) - goldstone , dielectric , liquid crystal , phase (matter) , materials science , derivative (finance) , mode (computer interface) , range (aeronautics) , conductivity , electrical resistivity and conductivity , condensed matter physics , helix (gastropod) , analytical chemistry (journal) , optics , chemistry , physics , organic chemistry , optoelectronics , composite material , quantum mechanics , ecology , geodesy , snail , computer science , financial economics , economics , biology , geography , operating system
Dielectric measurements in the kHz‐range on (S)‐2‐(4‐n‐octyloxyphenyl)‐5‐[4‐(4‐methyl‐2‐chloropentanoyloxy)‐phenyl]‐1,3,4‐thiadiazole have been carried out in the smectic C* phase. A very intensive Goldstone mode (Δϵ = 3000, ƒ R = 20–80 Hz) was found between 330 and 380 K. The expected unwinding of the helix with different dc bias fields could not be detected due to the increasing conductivity of the sample.