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How to determine model Hamiltonians for strongly correlated materials

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Figure

FIG. 1: Anderson super-exchange mechanism
FIG. 5: Leading non local contribution to the on-site effective repulsion integral between two electrons in the same orbital.
FIG. 8: Leading non local dynamical contribution to the effec- effec-tive hopping t ab .
FIG. 10: Schematic structure of the coupled magnetic ladders in the (a,b) plane.
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