LIFSHITZ-POINT CRITICAL AND TRICRITICAL BEHAVIOR IN ANISOTROPICALLY STRESSED PEROVSKITES

被引：71

作者：

AHARONY, A ^{[1
]}

BRUCE, AD ^{[1
]}

机构：

[1] IBM CORP,ZURICH RES LAB,CH-8803 RUSCHLIKON,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 42卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.42.462

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The antiferrodistortive phase transitions of some perovskite crystals, driven first order by strongly cubic order-parameter fluctuations, are shown to become continuous at finite anisotropic stresses favoring ordering of one order-parameter component. The associated critical and tricritical behavior will be that of one of a spectrum of uniaxial Lifshitz systems, its precise character reflecting the form of the anisotropy in the soft-mode dispersion. Our predictions are in substantial accord with recent experiments on RbCaF3. © 1979 The American Physical Society.

引用

页码：462 / 465

页数：4

共 24 条

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[J]. PHYSICAL REVIEW LETTERS, 1979, 42 (07) : 465 - 468
[10] BUZARE JY, 1977, J PHYS LETT-PARIS, V38, pL445

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