Interference effect in combined elastic and inelastic scattering of an energetic electron reflected from a disordered medium with generation of a surface plasmon

Autor: B. N. Libenson
Rok vydání: 2003
Předmět:
Zdroj: Physics of the Solid State. 45:21-27
ISSN: 1090-6460
1063-7834
DOI: 10.1134/1.1537403
Popis: Quantum interference in combined elastic and inelastic scattering of an energetic electron with excitation of a surface plasmon leads to a change in the shape of the corresponding peak in the electron-energyloss spectrum. The plasmon generation is suppressed near the frequency \({{\omega _p } \mathord{\left/ {\vphantom {{\omega _p } {\sqrt 2 }}} \right. \kern-\nulldelimiterspace} {\sqrt 2 }}\). The suppression increases with increasing surface-plasmon wave length, because the interference of the energetic-electron scattering processes differing in the sequential order of elastic and inelastic scattering becomes progressively more destructive. The decrease in the height of the surface-plasmon peak in the electron-energy-loss spectrum leads to a non-dissipative broadening in this peak. Quantum interference also causes a specific feature to occur in the azimuthangle dependence of the spectral intensity as the electron energy loss increases in the immediate vicinity of the surface-plasmon peak.
Databáze: OpenAIRE
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