We compute, from first principles, the dielectric function and electron energy loss spectrum (EELS) of an oxidized Si(100)(2×2) surface. The surface local field effect is found to be important for the calculation of EELS in a reflection geometry. Theoretical problems that arise when local fields are included within the periodic supercell approach are discussed in detail.
Dielectric response and electron energy loss spectra of an oxidized Si(100)-(2x2) surface / L. Caramella, G. Onida, C. Hogan (THE SCIENCE AND CULTURE SERIES - PHYSICS). - In: Epioptics-9 : proceedings / [a cura di] A. Cricenti. - Hackensack : World Scientific, 2008. - ISBN 9789812794024. - pp. 62-69 (( Intervento presentato al 39. convegno Course of the International School of Solid State Physics tenutosi a Erice nel 2006 [10.1142/9789812794031_0004].
Dielectric response and electron energy loss spectra of an oxidized Si(100)-(2x2) surface
L. CaramellaPrimo
;G. OnidaSecondo
;
2008
Abstract
We compute, from first principles, the dielectric function and electron energy loss spectrum (EELS) of an oxidized Si(100)(2×2) surface. The surface local field effect is found to be important for the calculation of EELS in a reflection geometry. Theoretical problems that arise when local fields are included within the periodic supercell approach are discussed in detail.
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