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Type: 
Journal
Description: 
The electronic properties of a Ca bilayer deposited on Cu(111) have been investigated by high-resolution electron energy loss spectroscopy. For the as-deposited Ca bilayer, the surface plasmon was recorded at 3.3eV. Temperature induces a surface metal-insulator transition (evidenced by the shift of the surface plasmon energy), leading to the formation of CaO thin layers which are highly reactive towards water molecules. The presence of occupied d band in the calcium overlayer modifies surface plasmon frequency and strongly influences its dispersion relation. Results are well explained within the framework of the s-d polarization theory.
Publisher: 
World Scientific Publishing Company
Publication date: 
1 Aug 2010
Authors: 
Biblio References: 
Volume: 17 Issue: 04 Pages: 411-417
Origin: 
Surface Review and Letters