Coupling of polarization and dislocation in ferroelectric smectic liquid-crystal films

被引：11
作者：
Holyst, R
Poniewierski, A
Fortmeier, P
Stegemeyer, H
机构：
[1] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland
[2] Polish Acad Sci, Coll Sci, PL-01224 Warsaw, Poland
[3] Univ Gesamthsch Paderborn, Inst Phys Chem, D-33095 Paderborn, Germany
[4] Ecole Normale Super, Paris, France
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.81.5848
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The polarization vector in ferroelectric smectic-C* films preferably aligns along a dislocation line due to the Coulomb interaction between polarization charges. The electric field locally perpendicular to the dislocation line distorts it, and in the case of a dislocation loop an n-finger structure is formed, with n depending on the applied voltage. This phenomenon has been observed in an experiment in which the screening effect of ion impurities has been partially lifted in a low-frequency (3 Hz) electric field. A characteristic length scale related to this phenomenon is of the order of 10(4) Angstrom.
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页码：5848 / 5851
页数：4
相关论文
共 12 条
[1]  
[Anonymous], 1975, J PHYS
[2]   BEHAVIOR OF A 1ST-ORDER SMECTIC-A-SMECTIC-C TRANSITION IN FREESTANDING LIQUID-CRYSTAL FILMS [J].
BAHR, C ;
FLIEGNER, D .
PHYSICAL REVIEW A, 1992, 46 (12) :7657-7663
[3]   SUBMICROSECOND BISTABLE ELECTRO-OPTIC SWITCHING IN LIQUID-CRYSTALS [J].
CLARK, NA ;
LAGERWALL, ST .
APPLIED PHYSICS LETTERS, 1980, 36 (11) :899-901
[4]  
DEGENNES PG, 1993, PHYSICS LIQUID CRYST
[5]   Meniscus and dislocations in free-standing films of smectic-A liquid crystals [J].
Geminard, JC ;
Holyst, R ;
Oswald, P .
PHYSICAL REVIEW LETTERS, 1997, 78 (10) :1924-1927
[6]   FIELD-INDUCED 1ST-ORDER ORIENTATION TRANSITIONS IN FERROELECTRIC LIQUID-CRYSTALS [J].
HANDSCHY, MA ;
CLARK, NA ;
LAGERWALL, ST .
PHYSICAL REVIEW LETTERS, 1983, 51 (06) :471-474
[7]   UNDULATION INSTABILITIES IN SMECTIC C PHASES [J].
JOHNSON, D ;
SAUPE, A .
PHYSICAL REVIEW A, 1977, 15 (05) :2079-2085
[8]   Thickness dependent low frequency relaxations in ferroelectric liquid crystals with different temperature dependence of the helix pitch [J].
Novotna, V ;
Glogarova, M ;
Bubnov, AM ;
Sverenyak, H .
LIQUID CRYSTALS, 1997, 23 (04) :511-518
[9]   PHYSICS OF SMECTIC MEMBRANES [J].
PIERANSKI, P ;
BELIARD, L ;
TOURNELLEC, JP ;
LEONCINI, X ;
FURTLEHNER, C ;
DUMOULIN, H ;
RIOU, E ;
JOUVIN, B ;
FENEROL, JP ;
PALARIC, P ;
HEUVING, J ;
CARTIER, B ;
KRAUS, I .
PHYSICA A, 1993, 194 (1-4) :364-389
[10]   X-RAY AND OPTICAL STUDIES OF THE THICKNESS DEPENDENCE OF THE PHASE-DIAGRAM OF LIQUID-CRYSTAL FILMS [J].
SIROTA, EB ;
PERSHAN, PS ;
SORENSEN, LB ;
COLLETT, J .
PHYSICAL REVIEW A, 1987, 36 (06) :2890-2901
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