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Type: 
Journal
Description: 
A novel low-energy collective mode of electrons near the Fermi energy has been detected at 5 meV for (9 × 9)-Ag/Cu(111) by high-resolution electron energy loss spectroscopy. This collective electronic excitation does not exist on the bare Cu substrate or on a silver monolayer deposited on Ni(111). It has been assigned to the excitation of the Friedel oscillations in the silver adlayer. Such finding is important for understanding dynamic electron screening at a metal/metal interface. In particular, this work provides the grounds for more accurate theoretical studies aimed at describing the surface loss function and low-energy collective electronic modes in Ag/Cu(111).
Publisher: 
Springer US
Publication date: 
1 Jun 2013
Authors: 
Biblio References: 
Volume: 8 Issue: 2 Pages: 357-360
Origin: 
Plasmonics