Excitation of surface plasmons on metals by low-energy electrons: The role of interference effects

Autor:	D. L. Mills, Burl M. Hall
Rok vydání:	1991
Předmět:	Scattering amplitude Physics Dipole Surface plasmon Quasiparticle Reflection (physics) Specular reflection Atomic physics Excitation Plasmon
Zdroj:	Physical Review B. 44:1202-1208
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.44.1202
Popis:	We present quantitative theoretical studies of the wave-vector dependence of the cross section for excitation of surface plasmons by low-energy electrons incident on the Ag(100) surface. The analysis assumes the dipole mechanism provides the dominant coupling between the electron and the surface plasmon. The theory provides a very good account of the systematic features reported recently by Rocca and Valbusa. As emphasized in earlier theoretical discussions, under conditions used in the experiments, the interference between two excitation channels--- loss then reflection'' and reflection then loss''---enters importantly in the description of the excitation process. In addition, it is essential to include the influence of the image potential on both the amplitude and phase on the scattering amplitude for elastic, specular reflection from the surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fccff2851f6f4c878b57e32a9601e50 https://doi.org/10.1103/physrevb.44.1202 Zobrazit plný text záznamu