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Abbreviated Journal Title

Phys. Rev. B

Keywords

Metal-Films; Excitations; Physics; Condensed Matter

Abstract

We discuss the effects of surfaces on bulk plasma oscillations in a metallic film of thickness L. The leading corrections to the plasma frequencies due to the surfaces are proportional to L-1. The frequencies of low-lying long-wavelength modes are given by the dispersion relation of bulk modes, omega = omega(p)[1 + alpha(q2/k(F)2)], where the allowed q values are q(n) = (npi/LBAR), LBAR = L - 2d(b), and d(b) is a complex length characteristic of the surface (reminiscent of, but different from, Feibelman's d(perpendicular-to)). An explicit expression for d(b) is derived. Resonant excitation by an external field E0e(-iwt) is calculated.

Journal Title

Physical Review B

Volume

48

Issue/Number

16

Publication Date

1-1-1993

Document Type

Article

Language

English

First Page

12240

Last Page

12244

WOS Identifier

WOS:A1993ME60100087

ISSN

0163-1829

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