Competition between ferroelectric and flexoelectric polarization in freely suspended smectic films

被引：21
|
作者：
Schlauf, D [1 ]
Bahr, C
Dolganov, VK
Goodby, JW
机构：
[1] Univ Marburg, Inst Phys Chem, D-35032 Marburg, Germany
[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia
[3] Univ Hull, Sch Chem, Kingston Upon Hull HU6 7RX, N Humberside, England
来源：
EUROPEAN PHYSICAL JOURNAL B | 1999年 / 9卷 / 03期
关键词：
D O I：
10.1007/s100510050787
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
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.
引用
收藏
页码：461 / 469
页数：9
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