Phase transitions in two-dimensional systems with continuous degeneracy

被引：89
|
作者：
Korshunov, S. E. [1 ]
机构：
[1] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 119334, Russia
来源：
PHYSICS-USPEKHI | 2006年 / 49卷 / 03期
关键词：
D O I：
10.1070/PU2006v049n03ABEH005838
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We discuss the nature and sequence of phase transitions in two-dimensional systems with continuous degeneracy, in which other factors must be taken into account in addition to the interaction of point-like topological excitations, namely, the existence of an additional discrete degeneracy (which leads to the possibility of domain wall formation), the removal of accidental degeneracy by fluctuations, the formation of solitons, Formally, we discuss various modifications of the two-dimensional XY model, while physical objects that can be described by such models are various arrays of superconducting junctions and noncollinear planar antiferromagnets.
引用
收藏
页码：225 / 262
页数：38
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