摘要
从多体系统的总哈密顿量出发，保留双中心积分项，得到了一个新模型，此模型不仅考虑了原子内的电子关联，而且考虑了原子之间的关联效应，从而克服了赫伯德（Hubbard）模型的缺点。本文还对新模型进行了深人的分析，发现对绝缘磁性材料，它还原为海森伯模型；通过参数的变化，它能够对包括绝缘体、金属在内的各种磁性材料给出统一的数学描述，形成了统一的物理图象。
One new model has been made by retaining the double-centerintegration terms of manybody system's total Hamiltonian. This model not only holds intra-atomic electronic correlation, but also takes account of interatomic electronic correlation effects, thus gets rid of the shortcoming of the Hubbard model. This paper has also made further analysis of the new model. It is seen that the model reduces to the Heisenberg model for isolate magnetical material and that it has the united mathmatical treatment with various magnetic materials including isolators and metals by changing parameters and forms an united physical picture.
出处
《华东船舶工业学院学报》
1998年第5期55-59,共5页
Journal of East China Shipbuilding Institute(Natural Science Edition)
基金
院青年教师基金
关键词
海森伯模型
晶体模型
磁性
Heisenberg model
crystal model
magnetism
