Surface spectral functions and excitation frequencies in thin metallic films

Despoja, Vito and Marušić, Leonardo and Šunjić, Marijan (2005) Surface spectral functions and excitation frequencies in thin metallic films. Fizika A, 14 (2). pp. 207-218. ISSN 1330-0008

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Abstract

Surface spectral functions are calculated for very thin metal slabs, containing both collective modes and single-particle excitations. This is achieved by calculating the surface dielectric function ε_p(Q,ω) for the thin jellium slab in the density functional theory and random phase approximation, using Kohn-Sham wavefunctions within the local density approximation, from which we derive the surface spectral functions. Influence of the slab thickness on the excitation spectra is studied, and the dispersion relations of the collective modes are obtained. Slightly modified fast converging method for the calculation of the Kohn-Sham wavefunctions is presented.

Item Type: Article
Keywords: surface spectral functions, collective modes, single-particle excitations, Kohn-Sham wavefunctions
Date: 2005
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 15 Apr 2014 17:41
Last Modified: 15 Apr 2014 17:41
URI: http://digre.pmf.unizg.hr/id/eprint/858

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