CALCULATION OF PARAMETERS IN MODEL HAMILTONIANS

被引：54

作者：

GUNNARSSON, O

机构：

[1] Max-Planck Insitut für Festkörperforschung, D-7000 Stuttgart 80

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.41.514

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ab initio calculation of parameters of the Anderson model is illustrated within the framework of a simple, exactly solvable, model of a 3d compound. It is shown how the latter model can be mapped onto a simpler model, by projecting out degrees of freedom, and by including these degrees of freedom implicitly as a renormalization of parameters. For the model studied this approach is shown to be exact in the limit when the projected degrees of freedom correspond to very delocalized electrons. © 1990 The American Physical Society.

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页码：514 / 518

页数：5

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