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Illustrating field emission theory by using plots of transmission probability and barrier strength

Fischer, A, Mousa, MS, Fischer, A, Deane, JHB and Forbes, RG (2012) Illustrating field emission theory by using plots of transmission probability and barrier strength

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Abstract

This poster is part of a continuing attempt to make field emission theory more transparent. When interpreting current-voltage characteristics related to cold field electron emission (CFE), it is widely assumed that these are controlled and dominated by the behaviour of the tunneling barrier at the emitter/vacuum interface. The transmission probability D for this barrier can be written D ≈ P exp[-G], where P is a transmission pre-factor and G is the JWKB exponent or "barrier strength". The influence of theoretical effects on the barrier form and on D can be illustrated by plotting (-G) and/or lnD as functions of reciprocal field or voltage. This is a specialized form of Fowler-Nordheim (FN) plot. Its usefulness as a pedagogical tool has perhaps been under-appreciated; it may also prove useful for discussing the issue of what causes curvature in FN plots. © 2012 IEEE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Fischer, AUNSPECIFIEDUNSPECIFIED
Mousa, MSUNSPECIFIEDUNSPECIFIED
Fischer, AUNSPECIFIEDUNSPECIFIED
Deane, JHBUNSPECIFIEDUNSPECIFIED
Forbes, RGr.forbes@surrey.ac.ukUNSPECIFIED
Date : 2012
Identification Number : https://doi.org/10.1109/IVNC.2012.6316938
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:38
Last Modified : 17 May 2017 15:05
URI: http://epubs.surrey.ac.uk/id/eprint/836116

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