Frustrated structure induced on ferroelectric smectic phases in banana-shaped molecular system

被引：123

作者：

Watanabe, J ^{[1
]}

Niori, T

Sekine, T

Tekezoe, H

机构：

[1] Tokyo Inst Technol, Dept Polymer Chem, Meguro Ku, Tokyo 152, Japan

[2] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 152, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1998年 / 37卷 / 2A期

关键词：

banana-shaped molecule; ferroelectric liquid crystals; spontaneous polarization; frustrated smectic phase; X-ray pattern; C-2v symmetry; helical structure;

D O I：

10.1143/JJAP.37.L139

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We found that the frustration: i.e., unusual density modulation, is induced on ferroelectric SmA(b) and HexB(b) phases composed of achiral banana-shaped molecules. The frustration takes place along the bent direction of molecules, with four or five molecules included in each inversion unit. Such an unusual frustrated structure may be explained as a result of a two-dimensional escape from spontaneous polarization in the ferroelectric phases.

引用

页码：L139 / L142

页数：4

共 17 条

[1] CHARACTERIZATION OF A NEW HELICAL SMECTIC LIQUID-CRYSTAL [J].

GOODBY, JW ;

WAUGH, MA ;

STEIN, SM ;

CHIN, E ;

PINDAK, R ;

PATEL, JS .

NATURE, 1989, 337 (6206) :449-452

[2] DEVELOPMENT OF HELICAL CHOLESTERIC STRUCTURE IN A NEMATIC LIQUID-CRYSTAL DUE TO DIPOLE-DIPOLE INTERACTION [J].

KHACHATURYAN, AG .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1975, 36 (10) :1055-1061

[3] COEXISTENCE OF A 2D DISCOMMENSURATION WALL NETWORK AND OF A HEXATIC MOLECULAR ORDERING IN A LIQUID-CRYSTALLINE PHASE [J].

LEVELUT, AM ;

TINH, NH .

JOURNAL DE PHYSIQUE, 1987, 48 (05) :847-853

[4] SMALL-ANGLE X-RAY-SCATTERING INVESTIGATIONS OF NOVEL SUPERSTRUCTURES IN COMBINED CHIRAL LIQUID-CRYSTALLINE POLYMERS [J].

MENSINGER, H ;

BISWAS, A ;

POTHS, H .

MACROMOLECULES, 1992, 25 (12) :3156-3163

[5] Frustrated smectic phase with unusual density modulation along layer observed in main chain type of polymers [J].

Nakata, Y ;

Watanabe, J .

POLYMER JOURNAL, 1997, 29 (02) :193-197

[6] Distinct ferroelectric smectic liquid crystals consisting of banana shaped achiral molecules [J].

Niori, T ;

Sekine, T ;

Watanabe, J ;

Furukawa, T ;

Takezoe, H .

JOURNAL OF MATERIALS CHEMISTRY, 1996, 6 (07) :1231-1233

[7] SMECTIC MESOPHASE PROPERTIES OF DIMERIC COMPOUNDS .1. DIMERIC COMPOUNDS BASED ON THE MESOGENIC AZOBENZENE UNIT [J].

NIORI, T ;

ADACHI, S ;

WATANABE, J .

LIQUID CRYSTALS, 1995, 19 (01) :139-148

[8] Distinct ferroelectric smectic liquid crystals consisting of achiral molecules with banana shape [J].

Niori, T ;

Sekine, T ;

Watanabe, J ;

Furukawa, T ;

Takezoe, H .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1997, 301 :337-&

[9]

NIORI T, 1997, THESIS TOKYO I TECHN

[10] THE SMECTIC STATE [J].

PROST, J .

ADVANCES IN PHYSICS, 1984, 33 (01) :1-46

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