Kosterlitz-Thouless and magnetic transition temperatures in layered magnets with a weak easy-plane anisotropy

被引：33
|
作者：
Irkhin, VY [1 ]
Katanin, AA [1 ]
机构：
[1] Inst Phys Met, Ekaterinburg 620219, Russia
来源：
PHYSICAL REVIEW B | 1999年 / 60卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.60.2990
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The two-dimensional (2D) Heisenberg magnet with a weak easy-plane anisotropy is considered. A renormalization-group analysis in this model is performed for both quantum and classical cases. A crossover from the Heisenberg to 2D XY model is discussed. The magnetic transition owing to the interlayer coupling is considered. Analytical results for the Kosterlitz-Thouless and Curie (Neel) temperatures are derived by taking into account two-loop corrections. The results are compared with experimental data, e.g., on K2CuF4, and turn out to provide a quantitative description, unlike the standard one-loop results. [S0163-1829(99)08725-1].
引用
收藏
页码：2990 / 2993
页数：4
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