Article (Scientific journals)
The case of thresholdless antiferroelectricity: Polarization-stabilized twisted SmC* liquid crystals give V-shaped electro-optic response
Rudquist, Per; Lagerwall, Jan; Buivydas, M. et al.
1999In Journal of Materials Chemistry, 9 (6), p. 1257-1261
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Keywords :
Thresholdless switching; chiral smectics; ferroelectrics
Abstract :
[en] We have studied the three-component liquid crystal mixture reported to exhibit ‘thresholdless antiferroelectricity’ [Inui et al., J. Mater. Chem, 1996, 6, 671]. We find that the thresholdless or V-shaped switching is obtained in thf absence of antiferroelectricity. This analog electro-optic response is due to the field-induced switching of a twisted smectic C* structure stabilized by polar surface interactions and by electrostatic bulk polarization charge interactions. The latter confine the director twist to thin surface regions leaving the bulk of the cell uniform, which gives good extinction at zero field. In sufficiently thin cells, such thresholdless switching can in fact be followed down to much lower temperatures, where the bulk would be antiferroelectric, but is maintained in the cells in the ferroelectric state by hysteresis from surface action.
Disciplines :
Physics
Author, co-author :
Rudquist, Per
Lagerwall, Jan  ;  Chalmers University of Technology
Buivydas, M.
Gouda, F.
Lagerwall, Sven T.
Clark, Noel A.
Maclennan, Joseph E.
Shao, R. F.
Coleman, D.
Bardon, Sebastien
Bellini, Tommaso
Link, Darren R.
Natale, Giorgio
Glaser, Mathew A.
Walba, David M.
Wand, Michael D.
Chen, X. H.
More authors (7 more) Less
Language :
English
Title :
The case of thresholdless antiferroelectricity: Polarization-stabilized twisted SmC* liquid crystals give V-shaped electro-optic response
Publication date :
1999
Journal title :
Journal of Materials Chemistry
ISSN :
1364-5501
Publisher :
Royal Society of Chemistry, Cambridge, United Kingdom
Volume :
9
Issue :
6
Pages :
1257-1261
Peer reviewed :
Peer Reviewed verified by ORBi
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