Izvestiya of Saratov University.

Physics

ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)

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Davidovich M. V. Maximal field emission current densities in nanostructures. Izvestiya of Saratov University. Physics , 2025, vol. 25, iss. 3, pp. 266-276. DOI: 10.18500/1817-3020-2025-25-3-266-276, EDN: AYKMGN

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
29.08.2025
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English
Heading: 
Theoretical and mathematical physics
Article type: 
Review
UDC: 
535.538.935
DOI: 
10.18500/1817-3020-2025-25-3-266-276
EDN: 
AYKMGN

Maximal field emission current densities in nanostructures

Autors: 
Davidovich Mikhail Vladimirovich, Saratov State University
Abstract: 

Background and Objectives: The problems of issues of achieving high field emission current densities 2–4 orders of magnitude lower than the limit values 1015–1016 A/m2 are considered. Materials and Methods: Methods of obtaining them, field emission models, as well as possible emission structures providing large integrated currents in ribbon electron beams are analyzed. Results: It has been shown that the high current densities of the order 1010–1012 A/m2 can be achieved in vacuum quantum structures with two or more potential wells during resonant tunneling. Conclusions: Obtaining high-precision sources requires nanotechnology to create heterostructures of the metal-isolator-metal type and the use of low temperatures. Amorphous glass-like diamond (GLD) is a good material for dielectric films, and conductive glasslike carbon (GLC) is a suitable material for conductive films. In fact, the technology of creating thinfilm structures such as GLD-GLC-CLD is used.

Key words: 
field emission
autocathode
Schrodinger equation
resonant tunneling
Poisson equation
Acknowledgments: 
This work was supported by the Russian Science Foundation (project No. 21-19-00226) and the Ministry of Science and Higher Education of the Russian Federation within the framework of the State Assignment (no. FSR-2023-0008).
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Received: 
05.05.2024
Accepted: 
15.05.2025
Published: 
29.08.2025
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