Renormalization from Density Functional Theory to Strong Coupling Models for the Electronic Structure of La sub 2 CuO sub 4

Starting from a realistic quantum-chemical description of the Cu-O based superconductors, strong coupling models are derived. The Local Density Functional approach, which has been shown to accurately describe the cohesive properties of these materials e.g. La sub 2 CuO sub 4 is the starting point. These results are mapped onto a multiband Hubbard model providing a complete set of numerical parameters which represent the specific features of the Cu-O planes.