Li, Y.; Mann, J.; Rosenzweig, J. Modeling Field Electron Emission from a Flat Au (100) Surface with Density-Functional Theory. Instruments2023, 7, 47.
Li, Y.; Mann, J.; Rosenzweig, J. Modeling Field Electron Emission from a Flat Au (100) Surface with Density-Functional Theory. Instruments 2023, 7, 47.
Li, Y.; Mann, J.; Rosenzweig, J. Modeling Field Electron Emission from a Flat Au (100) Surface with Density-Functional Theory. Instruments2023, 7, 47.
Li, Y.; Mann, J.; Rosenzweig, J. Modeling Field Electron Emission from a Flat Au (100) Surface with Density-Functional Theory. Instruments 2023, 7, 47.
Abstract
Field electron emission, or electron tunneling through a potential barrier under the influence of a strong electrostatic field, is of broad interest to the accelerator physics community. For example, it is the source of undesirable dark currents in resonant cavities, providing a limit to high-field operation. The classical approach to field electron emission is the Fowler-Nordheim (FN) framework, which incorporates a simplified surface potential and various assumptions. Here we build a more realistic model using the potential and charge densities derived from a density-functional theory (DFT) calculation. We examine the correction factors associated with each model assumption. Compared to the FN framework, our results can be extended up to 80 GV/m, a limit that has been reached in laser-induced strong field emission scenarios.
Keywords
field electron emission; DFT; Au (100); Fowler-Nordheim; laser field emission
Subject
Physical Sciences, Other
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
