摘要
运用变分累积展开方法研究了伊辛薄膜的临界温度和临界指数 ,并和实验结果进行了比较 .应用相关有效场理论研究了海森堡薄膜的临界行为 ,并把两种方法进行了比较 。
This paper applies the method of variational cumulate expansion to research of the critical temperature and the critical exponent of Ising-film.And its result accords with experimental result appropriately .the effective-field theory is also exerted to analyze the critical action of Heisenberg model. By making a comparison between the two methods it is successful to get to the best approach.
基金
重庆市教委科学技术研究项目 (批准号 :0 3 12 0 2 )资助
关键词
海森堡模型
伊辛模型
相关有效场
临界温度
临界指数
Heisenberg model
Ising model
effective-field theory
critical- temperature
critical exponent
