The Effect of d-Element Traces on the Electronic Structure of Cathodes in Microwave Devices

It has been experimentally established for the first time using electron spectroscopy for chemical analysis that traces of d elements (W, Re, Ni, Pd, and Os) in BaO crystallites contained in cathodes of microwave devices lead to the formation of the donor surface states on the crystallite surface, w...

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Published inTechnical physics letters Vol. 46; no. 2; pp. 106 - 109
Main Authors Kapustin, V. I., Li, I. P., Shumanov, A. V., Moskalenko, S. O., Zalyaliev, R. R., Kozhevnikova, N. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.02.2020
Springer Nature B.V
Subjects
Barium oxides
Cathodes
Chemical analysis
Classical and Continuum Physics
Crystallites
Electronic structure
Lattice vacancies
Physics
Physics and Astronomy
Potential barriers
Work functions
element traces
cathodes of microwave devices
donor and acceptor surface states
barium oxide crystallites
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Summary:It has been experimentally established for the first time using electron spectroscopy for chemical analysis that traces of d elements (W, Re, Ni, Pd, and Os) in BaO crystallites contained in cathodes of microwave devices lead to the formation of the donor surface states on the crystallite surface, which can partially compensate the acceptor surface states caused by surface oxygen vacancies, which reduces the potential barrier on the crystallite surface and, consequently, the cathode work function.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785020020066