海森伯铁磁系统的总能量  

The total energy of Heisenberg ferromagnetic systems

作　　者：王怀玉[1] 夏青[2] 

机构地区：[1]清华大学物理系,北京100084 [2]西安机电信息技术研究所,西安710065

出　　处：《物理学报》2007年第9期5466-5470,共5页Acta Physica Sinica

摘　　要：对于海森伯铁磁系统,利用多体格林函数方法,在无规相近似下,并且考虑到关联函数〈S+S-〉时,得到对于任意自旋S普遍适用的总能量的表达式.对于三维和二维的情况给出了计算结果.得到的总能量的数值低于没有考虑关联函数时的数值.The total energy of the Heisenberg ferromagnetic system is calculated by the many-body Green＇s function method under random phase approximation when the correlation function 〈S^＋S^-〉 is considered. A general expression of the total energy universally applicable to any spin quantum number S is obtained. Numerical results are computed. The energy is lower than the case when the correlation function is not included.

关 键 词：海森伯模型 铁磁系统 总能量 关联函数 

分 类 号：O481[理学—固体物理]