Transitions between paraelectric and ferroelectric phases of bent-core smectic liquid crystals in the bulk and in thin freely suspended films

被引：19

作者：

Eremin, Alexey ^{[1
]}

Floegel, Martin ^{[1
]}

Kornek, Ulrike ^{[1
]}

Stern, Stephan ^{[1
]}

Stannarius, Ralf ^{[1
]}

Nadasi, Hajnalka ^{[2
]}

Weissflog, Wolfgang ^{[2
]}

Zhu, Chenhui ^{[3
,4
]}

Shen, Yongqiang ^{[3
,4
]}

Park, Cheol Soo ^{[3
,4
]}

Maclennan, Joseph ^{[3
,4
]}

Clark, Noel ^{[3
,4
]}

机构：

[1] Univ Magdeburg, Inst Expt Phys, ANP, D-39016 Magdeburg, Germany

[2] Univ Halle Wittenberg, Inst Phys Chem, D-06120 Halle, Saale, Germany

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[4] Univ Colorado, Liquid Crystal Mat Res Ctr, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW E | 2012年 / 86卷 / 05期

关键词：

SUPERSTRUCTURAL CHIRALITY; POLAR ORDER; POLARIZATION; PATTERNS; FIELD;

D O I：

10.1103/PhysRevE.86.051701

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We report on the contrasting phase behavior of a bent-core liquid crystal with a large opening angle between the mesogenic units in the bulk and in freely suspended films. Second-harmonic generation experiments and direct observation of director inversion walls in films in an applied electric field reveal that the nonpolar smectic C phase observed in bulk samples becomes a ferroelectric "banana" phase in films, showing that a mesogen with a small steric moment can give a phase with polar order in freely suspended films even when the corresponding bulk phase is paraelectric.

引用

页数：10

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