| Issue |
Europhys. Lett.
Volume 36, Number 9, December III 1996
|
|
|---|---|---|
| Page(s) | 691 - 694 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00288-6 | |
| Published online | 01 September 2002 | |
The temperature dependence of the anchoring energy threshold of FLC cells with weak surface anchoring *
Max Planck Research Group, Liquid Crystalline Systems at Martin
Luther University, Mühlpforte 1, 06108 Halle/S., Germany
Received:
19
July
1996
Accepted:
6
November
1996
The switching properties of a short pitch 
chiral
smectic-C liquid-crystal film in bookshelf orientation were studied.
Transient-bistable switching was observed in the smectic-C phase over a broad
temperature range. The threshold voltage for transient-bistable switching
Uth was strongly dependent on the applied pulse width and on the
temperature. The anchoring energy threshold W0 for bistable switching varies within
the experimental error linearly with temperature and changes its sign at
a critical temperature Tcrit of about 
, where no
bistable switching could be observed. Above Tcrit an electric field
induces texture changes, which were investigated using polarizing microscopy.
PACS: 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 42.65.Pc – Optical bistability, multistability, and switching / 42.79.Kr – Display devices, liquid-crystal devices
© EDP Sciences, 1996
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