Dispersion study of the Ag(1 1 1) surface plasmon (SP) by means of high resolution electron energy loss spectroscopy (HREELS)

1987 ◽  
Vol 64 (8) ◽  
pp. 1179-1182 ◽  
Author(s):  
R. Contini ◽  
J.M. Layet
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Electron Energy ◽  
Surface Plasmon ◽  
Electron Energy Loss Spectroscopy ◽  
Resolution Electron ◽  
Electron Energy Loss

ELECTRONIC PROPERTIES OF CALCIUM ULTRATHIN LAYERS ON Cu(111): A HIGH-RESOLUTION ELECTRON ENERGY LOSS SPECTROSCOPY STUDY

2010 ◽  
Vol 17 (04) ◽  
pp. 411-417 ◽  
Author(s):  
ANTONIO POLITANO
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Electronic Properties ◽  
Electron Energy ◽  
Surface Plasmon ◽  
Electron Energy Loss Spectroscopy ◽  
Thin Layers ◽  
Resolution Electron ◽  
Ultrathin Layers ◽  
Electron Energy Loss

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.

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