The Kondo Lattice Model in Infinite Dimensions : I. Formalism(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
The Kondo Lattice Model in Infinite Dimensions : I. Formalism(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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DOI：
10.1143/jpsj.78.014702
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发表时间：
2008-08
影响因子：
1.7
通讯作者：
J. Otsuki;H. Kusunose;Y. Kuramoto
中科院分区：
文献类型：
--
作者：
J. Otsuki;H. Kusunose;Y. Kuramoto
提出了一种与动力学平均场理论相结合的Kondo晶格模型的格林函数形式。使用威克定理只传导电子，动力学量表示的t矩阵和它的两个粒子的推广。通过取t矩阵关于部分费米子频率的高频极限，得到了局域化矩的动力学关联函数。使用连续时间量子蒙特卡罗方法的计算步骤提供了明确的例子。
A Green-function formalism for the Kondo lattice model is presented, which is designed to be combined with dynamical mean-field theory. Using Wick's theorem only for conduction electrons, dynamical quantities are represented in terms of the t -matrix and its two-particle generalizations. By taking the high-frequency limit of the t -matrix with respect to a part of the fermion frequencies, one obtains dynamical correlation functions of localized moments. Explicit examples of calculation steps are provided using the continuous-time quantum Monte Carlo method.