CRITICAL-BEHAVIOR OF THE 2ND-HARMONIC IN A DENSITY WAVE SYSTEM

被引：23

作者：

WU, L ^{[1
]}

YOUNG, MJ ^{[1
]}

SHAO, Y ^{[1
]}

GARLAND, CW ^{[1
]}

BIRGENEAU, RJ ^{[1
]}

HEPPKE, G ^{[1
]}

机构：

[1] TECH UNIV BERLIN,IWAN N STRANSKI INST PYS & THEORET CHEM,W-1000 BERLIN 12,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.72.376

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a high resolution synchrotron x-ray study of the first- and second-harmonic order parameter and critical fluctuation scattering at a nematic-smectic-A2 transition. The order parameter, smectic susceptibility, and correlation lengths for the fundamental, as well as the order parameter and smectic susceptibility for the second harmonic, yield critical exponents in good agreement with 3D-XY multicritical scaling theory. However, the second-harmonic correlation lengths disagree markedly with predictions of current theory for density wave systems.

引用

页码：376 / 379

页数：4

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