21st Century Planar Field Emission Theory and its Role in Vacuum Breakdown Science

TL;DR

This paper reviews recent advances in field electron emission theory, highlighting the need to update traditional models for better understanding of vacuum breakdown phenomena and proposing a modernized '21st-century' approach.

Contribution

It provides a comprehensive overview of modern FE theory developments since 2006 and suggests transitioning to updated models for improved interpretation of experiments.

Findings

Feynman's electrostatics treatment contains an error.

Zener tunneling is unlikely the main cause of vacuum breakdown in CuO overlayers.

Historical FE theories are outdated and need revision for current applications.

Abstract

For explaining electrical breakdown, field electron emission (FE) is a mechanism of interest. In the period 2006 to 2010 there were significant developments in basic FE theory, but these have not yet fully entered general thinking in technological FE areas, which are often still based on 1960s thinking or (in some contexts) 1920s thinking about FE theory. This paper outlines the history of FE theory and provides an overview of modern developments and of some related topics, in so far as these affect the interpretation of experiments and the explanation of physical phenomena. The paper concentrates on principles, with references given where details can be found. Some suggestions are made about moving to the use of "21st-Century" FE theory. In addition, an error in Feynman's treatment of the electrostatics of pointed conductors is displayed, and it is found that Zener tunneling is implausible as a primary cause of vacuum breakdown from a CuO overlayer.