对称Anderson晶格基态的局域方法近似

本文采用格林函数技术,计算了对称Anderson晶格的H-F基态能量,然后采用局域方法近似,计算了相关能、相关基态能量、局域磁矩、电荷涨落和自旋涨落。使用平方态密度,得到了解析表达式。结果表明,当同一格点的f-f库仑相互作用U减小或d-f杂化强度V增大,局域磁矩变小。 关键词：

LOCAL APPROXIMATION APPROACH TO THE GROUND STATE OF THE SYMMETRIC ANDERSON LATTICE

Using the Green function technique, the H-F ground state energy of the symmetric Anderson lattice is caolulated. Then the correlation energy, ground state energy, local moments, charge-and Spin-fluctuations of the correlation ground State are caclulated with the local approximation. Corresponding analytical formulas are obtained for a rectangular density of state. The result indicates that local moments decrease with decreasing value of the one-site f-f coulomb interaction U and or increasing value of the d-f hybridization strength V.