Competition between ferroelectric and flexoelectric polarization in freely suspended smectic films

被引：0
|
作者：
D. Schlauf
C. Bahr
V.K. Dolganov
J.W. Goodby
机构：
[1] Institute of Physical Chemistry,
[2] University Marburg,undefined
[3] 35032 Marburg,undefined
[4] Germany,undefined
[5] Institute of Solid State Physics,undefined
[6] Russian Academy of Sciences,undefined
[7] 142432 Chernogolovka,undefined
[8] Moscow District,undefined
[9] Russia,undefined
[10] School of Chemistry,undefined
[11] The University,undefined
[12] Hull HU6 7RX,undefined
[13] UK,undefined
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 1999年 / 9卷
关键词：
PACS. 61.30.Gd Orientational order of liquid crystals; electric and magnetic field effects on order - 64.70.Md Transitions in liquid crystals;
D O I：
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中图分类号：
学科分类号：
摘要：
We report a detailed ellipsometric study of freely suspended films of chiral liquid-crystal compounds possessing smectic-A and smectic-C phases. In the temperature region between the smectic-A - smectic-C bulk and surface transitions, a discontinuous reconstruction of the tilt profile across the film is observed in the presence of a constant d.c. electric field. Comparison of the measured ellipsometric quantities with values calculated from model tilt profiles reveals a competition between a structure possessing a homogeneous tilt direction and large ferroelectric polarization and a structure with opposite tilt direction in the two film halfs and large flexoelectric polarization.
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页码：461 / 469
页数：8
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