GAPLESS PHASON IN AN ANTIFERROELECTRIC LIQUID-CRYSTAL

被引：31

作者：

MUSEVIC, I

BLINC, R

ZEKS, B

COPIC, M

WITTEBROOD, MM

RASING, T

ORIHARA, H

ISHIBASHI, Y

机构：

[1] CATHOLIC UNIV NIJMEGEN,MAT RES INST,6525 ED NIJMEGEN,NETHERLANDS

[2] NAGOYA UNIV,SCH ENGN,SYNTHET CRYSTAL RES LAB,CHIKUSA KU,NAGOYA 46401,JAPAN

[3] CATHOLIC UNIV NIJMEGEN,HIGH FIELD MAGNET LAB,6525 ED NIJMEGEN,NETHERLANDS

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.71.1180

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The phason dispersion in the antiferroelectric Sm-C(A)* liquid crystalline phase of 4-(1-methylheptyl-oxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate has been studied by quasielastic light-scattering experiments. The phason is found to be gapless as predicted for a Goldstone mode recovering the broken continuous symmetry. The dispersion has a minimum at q = 2q(c), where q(c) is the wave vector of the unperturbed Sm-C(A)* structure. These results are consistent with the alternating-tilt model of the antiferroelectric Sm-C(A)* phase.

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页码：1180 / 1183

页数：4

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