STATISTICAL-MECHANICS OF COUPLED ORDER PARAMETERS
STATISTICAL-MECHANICS OF COUPLED ORDER PARAMETERS
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DOI：
10.1088/0022-3719/8/5/005
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发表时间：
1975-01-01
期刊：
影响因子：
--
通讯作者：
IMRY, Y
中科院分区：
文献类型：
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作者：
IMRY, Y
引入了具有耦合序参量系统的广义Landau-Ginsburg模型。详细讨论了一个特定的模型与双二次耦合之间的两个（二阶）阶参数。这包括完整的，相当有趣的，在朗道理论近似的相图和波动效应的讨论。对于这些，简单的期望的基础上的拓扑结构的朗道自由能表面和重整化群的结果，包括后者的局限性的识别。有人认为，这些模型是非常普遍的和相关的许多系统的实验兴趣。
Generalized Landau-Ginsburg models for systems with coupled order parameters are introduced. Detailed discussion is given for a particular model with biquadratic coupling between two (second-order) order parameters. This includes the complete, rather interesting, phase diagrams within the Landau-theory approximation and a discussion of fluctuation effects. For these, simple expectations are presented based on the topology of the Landau free-energy surfaces and renormalization group results including an identification of the limitations of the latter. It is argued that these models are very general and relevant to many systems of experimental interest.