Naslov
Surface Spectral Functions and Excitation Frequencies in Thin Metallic Films

Autori
Despoja, Vito ; Marušić, Leonardo ; Šunjić, Marijan

Izvornik
Fizika A (1330-0008) 14 (2005); 207-218

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
metalic slab; spectrum; collective excitations; LDA; GW

Sažetak
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 $\varepsilon _{; ; ; ; p}; ; ; ; ({; ; ; ; \bf Q}; ; ; ; , \omega )$ for the thin jellium slab within the Random Phase Approximation, using Kohn-Sham wavefunctions within 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA