All field emission experiments are noisy, … are any meaningful?

Autor:	Anthony Ayari, Pascal Vincent, Sorin Perisanu, Philippe Poncharal, Stephen T. Purcell
Rok vydání:	2023
Předmět:	Condensed Matter - Materials Science Process Chemistry and Technology Materials Chemistry Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Electrical and Electronic Engineering Instrumentation Surfaces Coatings and Films Electronic Optical and Magnetic Materials
Zdroj:	Journal of Vacuum Science & Technology B. 41:024001
ISSN:	2166-2754 2166-2746
Popis:	Representing field emission data on a Fowler–Nordheim plot is both very common and strongly not recommended. It leads to a spurious estimation of the emitter parameters despite a very good data fit. There is a lack of a reliable method of analysis and a proper estimation of the uncertainty in the extracted parameters. In this article, we show that the uncertainty in the estimation of the field enhancement factor or the emission area can be as high as [Formula: see text] even for a tungsten single emitter in good ultrahigh vacuum conditions analyzed by the Murphy–Good model. Moreover, the choice of the exact Murphy–Good method can have a noticeable impact. We found that advanced analysis methods, based on the measurement of the differential conductance of the emitter, are so demanding in terms of emitter stability that up to now its requirements are probably out of reach in any field emission laboratory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1267381482c554a8221ce734a920d72 https://doi.org/10.1116/6.0002338 Zobrazit plný text záznamu