DIVERGENT THERMAL-DIFFUSIVITY AT A MEAN-FIELD TRICRITICAL POINT

被引：9

作者：

HOBBIE, EK

LIU, HY

HUANG, CC

BAHR, C

HEPPKE, G

机构：

[1] UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455

[2] TECH UNIV BERLIN,INST PHYS & THEORET CHEM,W-1000 BERLIN 12,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.67.1771

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A sharp divergence is observed in the thermal diffusivity very close to the transition temperature of a smectic-A-smectic-C transitionthat is known to be at a mean-field tricritical point. Similar but less pronounced behavior near other smectic-A-smectic-C transitions reveals a relationship between the size of this anomaly and the proximity of the system to a tricritical point. An application of the Ginzburg criterion suggests that this novel behavior might indicate a crossover to an asymptotic critical regime.

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页码：1771 / 1774

页数：4

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