ORDERING, METASTABILITY AND PHASE-TRANSITIONS IN 2 DIMENSIONAL SYSTEMS
ORDERING, METASTABILITY AND PHASE-TRANSITIONS IN 2 DIMENSIONAL SYSTEMS
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DOI：
10.1088/0022-3719/6/7/010
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发表时间：
1973-01-01
期刊：
影响因子：
--
通讯作者：
Thouless, DJ
中科院分区：
文献类型：
--
作者：
Kosterlitz, JM;Thouless, DJ
对于不存在常规长程序的二维系统，提出了一种新的序定义--拓扑序。相变的可能性，其特征在于在系统的外部扰动的响应的变化进行了讨论的上下文中的平均场类型的近似。在这个模型中发现的临界行为显示非常弱的奇异性。这些想法的应用XY模型的磁性，固-液转变，和中性超流体进行了讨论。这种类型的相变不会发生在超导体或海森堡铁磁体中。
A new definition of order called topological order is proposed for two-dimensional systems in which no long-range order of the conventional type exists. The possibility of a phase transition characterized by a change in the response of the system to an external perturbation is discussed in the context of a mean field type of approximation. The critical behaviour found in this model displays very weak singularities. The application of these ideas to the xy model of magnetism, the solid-liquid transition, and the neutral superfluid are discussed. This type of phase transition cannot occur in a superconductor nor in a Heisenberg ferromagnet.