PHASON DISPERSION AND MAGNETIC-FIELD INDUCED BAND-GAP IN A FERROELECTRIC LIQUID-CRYSTAL

被引：13

作者：

MUSEVIC, I

ZEKS, B

BLINC, R

WIERENGA, HA

RASING, T

机构：

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

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

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.68.1850

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The phason dispersion and the dielectric response of a ferroelectric Sm-C* liquid crystal in an external magnetic field have been measured. A magnetic-field-induced splitting of the phason branch into an acousticlike and an opticlike mode was observed, indicating a crossover between the plane-wave-like and solitonlike phason dynamics. The resulting band gap at q = 0 is a direct consequence of the broken continuous helicoidal symmetry of the Sm-C* phase in a transverse magnetic field.

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页码：1850 / 1853

页数：4

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