Interplay between single-particle and plasmonic excitations in the electronic response of thin Ag films.

Abstract

High-resolution electron energy loss spectroscopy is used to study the electronic properties of thin Ag layers on Ni(111). In addition to the ordinary surface plasmon at 3.8 eV, we observe a broad feature at 7-8 eV, whose nature is investigated as a function of scattering geometry and primary electron beam energy. Loss measurements unambiguously indicate that this mode has spectral components from both free-electron Ag plasmonic excitations (free-electron surface plasmons and multipole plasmons) and single-particle transitions.

DOI: 10.1088/0953-8984/25/30/305001

Cite this paper

@article{Politano2013InterplayBS, title={Interplay between single-particle and plasmonic excitations in the electronic response of thin Ag films.}, author={Antonio Politano and Vincenzo Formoso and Gennaro Chiarello}, journal={Journal of physics. Condensed matter : an Institute of Physics journal}, year={2013}, volume={25 30}, pages={305001} }