Crossover between monopole and multipole plasmon of Cs monolayers on Si(111) individually resolved in energy and momentum.
Phys Rev Lett
; 96(19): 196801, 2006 May 19.
Article
en En
| MEDLINE
| ID: mdl-16803123
The evolution of the plasmon spectrum of the Si(111) (7 x 7)-Cs surface has been studied by energy loss spectroscopy individually resolved in energy and momentum during the transition from substrate to Cs overlayer metallization. The multipole plasmon is identified by an extremely narrow angular distribution of the inelastic electron scattering, unaccounted for by standard dipole scattering theory. A crossover between multipole and monopole surface plasmon is observed at finite surface wave vectors , depending on Cs coverage, and reveals a high sensitivity of the short-wavelength multipole components on surface morphology.
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2006
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Estados Unidos