Magnetic Susceptibility of the Orbitally Degenerate ( J = 5/2) Periodic Anderson Model - Analysis on the Basis of the Fermi Liquid Theory -
Magnetic Susceptibility of the Orbitally Degenerate ( J = 5/2) Periodic Anderson Model - Analysis on the Basis of the Fermi Liquid Theory -
复制标题
轨道简并（J = 5/2）周期性安德森模型的磁化率 - 基于费米液体理论的分析 -
DOI：
10.1143/jpsj.65.172
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发表时间：
1996
影响因子：
1.7
通讯作者：
K. Yamada
中科院分区：
文献类型：
--
作者：
H. Kontani;K. Yamada
在轨道简并（J = 5/2）周期安德森模型中，磁化率由Pauli项和货车Vleck项组成。f -电子之间的强关联使前者得到强烈增强.但是，对于后者，强相关性的影响多年来一直不太清楚。在本文中，我们给出了长期存在的问题的解决方案。在d =∞近似下，我们在简并轨道费米液体理论的基础上，考虑了所有的顶点修正，一致地研究了这个问题.其结果是，我们得到的磁化率的简单表达式，并明确地表明，货车Vleck项也高度增强的强相关制度。这一事实自然地解释了在许多绝缘系统中观察到的增强的磁化率（即，Kondo绝缘体）。此外，我们还发现，在金属体系中，威尔逊比取1左右的值，与实验结果吻合得很好。
In the orbitally degenerate ( J = 5/2) Periodic Anderson Model, the magnetic susceptibility is composed of both the Pauli term and the Van Vleck term, as is well known. The former is strongly enhanced by the strong correlation between f -electrons. But, for the latter, the influence of the strong correlation has been obscure for years. In this paper we give the solution of the longstanding problem. With the aid of the d =∞ approximation, we study this problem on the basis of the Fermi liquid theory with degenerate orbitals, taking account of all the vertex corrections in a consistent way. As a result, we obtain the simple expression for the magnetic susceptibility, and show unambiguously that the Van Vleck term is also highly enhanced in the strong correlation regime. This fact explains naturally the enhanced magnetic susceptibility observed in many insulating systems (i.e., Kondo insulator). Moreover, we show that the Wilson ratio takes a value around 1 in the metallic system, in good agreement with expe...