无序对金属超晶格电子结构的影响——CPA方法

本文用一种简单的哈密顿模型,在紧束缚近似下,只计及对角矩阵元的无规分布,用CPA方法自洽地计算了无序所引起的金属超晶格电子结构的变化,给出了某些参数下局部态密度和自能曲线。 关键词：

THE INFLUENCE OF DISORDER ON THE ELECTRONIC STRUCTURES OF THE METALLIC SUPERL-ATT1CES——CPA METHOD

The changes of electronic structures in the metallic superlattices due to disorder have been calculated self-consistently by CPA method for a simple model hamiltonian, using tight-binding approximation and only the random distributions of diagonal matrix elements being taken into account. The local densities of electronic states and the curves of self-energy have been obtained for some values of the parameters.