Subthreshold photoemission from copper nanoclusters on the Si[O.sub.2] surface

Subthreshold photoemission from copper nanoclusters formed on the Si[O.sub.2] surface has been observed under irradiation of the surface by photons in the 3.1-6.5-eV energy range. The average size of copper nanoclusters on the silicon oxide surface is 250-500 nm. Besides the conventional photoemissi...

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Bibliographic Details
Published inPhysics of the solid state Vol. 53; no. 10; pp. 2160 - 2167
Main Authors Solov'ev, S.M, Potekhina, N.D
Format Journal Article
LanguageEnglish
Published Springer 01.10.2011
Subjects
Toy industry
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Summary:Subthreshold photoemission from copper nanoclusters formed on the Si[O.sub.2] surface has been observed under irradiation of the surface by photons in the 3.1-6.5-eV energy range. The average size of copper nanoclusters on the silicon oxide surface is 250-500 nm. Besides the conventional photoemission from the filled Shockley surface state (SS), strong photoemission has been recorded at incident photon energies of 0.5 eV below the work function of the copper surface. This emission is assumed to be generated in direct electron transitions from the SS state to the unfilled electron surface states formed by the Coulomb image potential, followed by escape from these states into vacuum.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783411100301