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Quantum mechanical response of coupled metallic slabs

The nonlocal dynamical polarisability of two arbitrarily shaped objects coupled by long-range Coulomb forces, when overlap of their electron densities is negligible, is calculated by expressing it in terms of the response functions of separate objects. That enables us to extend the Density Functional Theory approach within the Kohn-Sham scheme to such systems. The method is applied to the system consisting of two metallic slabs within the jellium model. The obtained response function of the total system is used to calculate the correlation energy of a static test charge placed in the system.

Response function; Correlation energy; Coupled slabs

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