周期性安德森模型的电子结构与自旋涨落性质

The Electronic Structure and Spin Fluctuation of the Periodic Anderson Model

采用泛函积分与相干势近似相结合的方法 ,对周期性安德森模型在顺磁相的电子结构和自旋涨落性质进行研究 .结果表明 ,随着温度的降低 ,自旋涨落减弱 .另外 ,体系的磁化率也随温度的降低而下降 .磁化率主要由自旋涨落的性质决定 。

Using a method to combine functional integral with the coherent potential approximation, we studied the electronic structure and the spin fluctuation of the periodic Anderson model in the paramagnetic state. The results show that the spin fluctuation weakens with decreasing temperature, so does the magnetic susceptibility. The magnetic susceptibility is mainly determined by the spin fluctuation and it can not be explained by the simple single electron theory.