High resolution electron energy loss spectroscopy of NH3in the 5.5–11 eV energy range

1985 ◽  
Vol 82 (4) ◽  
pp. 1797-1803 ◽  
Author(s):  
M. Furlan ◽  
M‐J. Hubin‐Franskin ◽  
J. Delwiche ◽  
D. Roy ◽  
J. E. Collin
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Energy Range ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Resolution Electron ◽  
Electron Energy Loss

Surface Phonon Dispersion in Graphite and its Modification Under Interaction with Lanthanum

1998 ◽  
Vol 05 (01) ◽  
pp. 427-431 ◽  
Author(s):  
Susanne Siebentritt ◽  
Roland Pues ◽  
Karl-Heinz Rieder ◽  
Alexander M. Shikin
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Energy Range ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Phonon Dispersion ◽  
Surface Phonon ◽  
Resolution Electron ◽  
Two Stages ◽  
Electron Energy Loss

Using high resolution electron energy loss spectroscopy (HREELS) the surface phonon dispersion of graphite has been determined in the Γ K direction over the whole energy range and the whole Brillouin zone. By depositing lanthanum and annealing we prepared a GIC-like phase which grows on top of an intermediate carbide. The phonon dispersion of this phase shows the same modes as graphite, but the optical ones are softened and the acoustical ones are stiffened. This is described within a Born-von Karman model. The evolution of the phonon dispersion gives a first hint that the GIC-like phase may develop in two stages: first a monolayer graphite on top of the carbide and then the very thin GIC layer.

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