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- Title
Anomalous thermal field emission.
- Authors
Ptitsin, V. E.
- Abstract
The field emissivity of ZrO2/W(100) nanoheterostructures made by applying a thin (≈10 nm) ZrO2 layer on the surface of a needle-like W(100) microcrystal is studied. At a nanoheterostructure temperature of ≈2000 K, electron emission is found to start at a low extracting (Laplace) field (below 50 V/μm). Under the conditions of steady electron emission, the emission current density from the surface of the heterostructure may reach anomalously high values (∼108 A/cm2). A phenomenological model of anomalous thermal field emission of electrons from the surface of the conductor (metal)-thin insulator heterostructure is suggested.
- Subjects
FIELD emission; ELECTRON emission; THERMIONIC emission; EMISSIVITY; ZIRCONIUM oxide; HETEROSTRUCTURES
- Publication
Technical Physics, 2007, Vol 52, Issue 4, p504
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784207040172