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title: Theory
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---
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# KKRsusc program: Theory
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This page should give you a brief introduction to the theoretical
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The Kohn-Sham (KS) Green function (GF) is the resolvent of the
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corresponding Hamiltonian, $G_{\text{KS}}(E) = (E -
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\mathcal{H}_{\text{KS}})\^{-1}$. In the Korringa-Kohn-Rostoker Green
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\mathcal{H}_{\text{KS}})^{-1}$. In the Korringa-Kohn-Rostoker Green
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function (KKR-GF) method, space is partitioned into nonoverlapping
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regions surrounding the atoms, labeled $i$. These regions are taken as
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spherical in the atomic sphere approximation (ASA), and the KS potential
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