Electrizaton and cathodoluminescence of single crystal MgO under 2.5 – 15 keV electron beam

[Display omitted] •A delay in surface potential establishment was found.•High values of secondary electron emission yield determine the delay.•A model of the incoming charge localization by the trapped electrons suggested.•CL spectra evolution recorded and discussed.•Synergetic effect supposed to be...

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Bibliographic Details
Published in:Applied surface science 2024-07, Vol.660, p.159964, Article 159964
Main Authors: Tatarintsev, A.A., Zykova, E.Yu, Ieshkin, A.E., Kiselevskiy, V.A., Orlikovskaya, N.G.
Format: Article
Language:English
Subjects:
Cathodoluminescence
Charging effect
Crystal defects
MgO
Subthreshold defects
Surface potential
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Summary:[Display omitted] •A delay in surface potential establishment was found.•High values of secondary electron emission yield determine the delay.•A model of the incoming charge localization by the trapped electrons suggested.•CL spectra evolution recorded and discussed.•Synergetic effect supposed to be responsible for subthreshold defects production. Kinetics of single crystal MgO electrization showed a delay in the surface potential establishment. A number of processes taking place in the surface electrization and, in their turn, influenced by it, are discussed: secondary electron emission, accumulated charge distribution and spreading in the sample, modification of defects in the sample by the electron beam. The evolution of cathodoluminescence spectra was recorded during the irradiation process, showing both increases and decreases in intensity. A synergetic effect was suggested to explain the subthreshold generation of defects by the electron beam.
ISSN:0169-4332
DOI:10.1016/j.apsusc.2024.159964