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Comments on the JWKB Approximation

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1 Author(s)
Forbes, Richard G. ; Adv. Technol. Inst., Surrey Univ., Guildford

The JWKB approximation involved in standard Fowler-Nordheim theory approximates a "quasi-classical potential energy" describing a tunneling probability for an electron approaching a tunneling barrier. Some comments regarding the adequacy of this approximation method are made and the principle of restoring a "pre-factor" into the tunneling probability approximation is argued. JWKB approximation is shown to be applicable in normal circumstances of cold field electron emission

Published in:

Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International

Date of Conference:

July 2006