Edgcombe, Christopher J. and Johansen, Adam M. (2003) Current-voltage characteristics of nonplanar cold field emitters. Journal of Vacuum Science and Technology. Part B. Nanotechnology & Microelectronics, Vol.21 (No.4). pp. 1519-1523. doi:10.1116/1.1591748

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Abstract

Conventional Fowler–Nordheim theory assumes that the emitter is planar, while most tips used in practice have curved emitting surfaces. Using a revised potential distribution, standard image theory and a dimensionless parameter x, we express the experimental current as a multiple σ of the current calculated using standard free-electron supply. A plot of σ(x) for one carbon emitter shows a maximum at a value of x corresponding to the known emitter radius. The calculated field strength at the emitter surface varies little with x. The values found for σ are sensitive to the accuracy of calculation and, to test the theory further, it is desirable both to improve the modelling of image effects and to obtain measurements of current–voltage characteristics and emitting radii together for more types of emitter. © 2003 American Vacuum Society.

Item Type:	Journal Article
Divisions:	Faculty of Science > Statistics
Journal or Publication Title:	Journal of Vacuum Science and Technology. Part B. Nanotechnology & Microelectronics
Publisher:	American Institute of Physics
ISSN:	2166-2746
Official Date:	July 2003
Dates:	Date Event July 2003 Published
Volume:	Vol.21
Number:	No.4
Page Range:	pp. 1519-1523
DOI:	10.1116/1.1591748
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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