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Static polarizability associated with multipole surface plasmons in metallic surfaces

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An Euler-Lagrange-type equation is solved to different orders for aplane metallic system perturbed by the externa! operator Q used previously in a sum-rule calculation. This approach managed to reproduce to within a few percent the multipole surface-plasmon energies. The jellium model is used for the positive ionic background and local-density functionals for the Hamiltonian. From the zeroth-order Euler-Lagrange equation a self-consistent ground-state density is obtained and used in the first-order equation to obtain the induced density. From the induced density, several aspects of the system response are considered and special attention is focused on the static polarizability.

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BARBERÁN FALCÓN, Núria and PI PERICAY, Martí. Static polarizability associated with multipole surface plasmons in metallic surfaces. Physical Review B. 1995. Vol. 51, num. 11, pags. 7329-7332. ISSN 0163-1829. [consulted: 4 of August of 2026]. Available at: https://hdl.handle.net/2445/10596

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