Calculating field emission currents in nanodiodes - a multi-group formalism with space charge and exchange-correlation effects
Abstract
Inclusion of electron-electron interaction is essential in nano-diodes to understand the underlying physical phenomenon and tailor devices accordingly. However, both space charge and exchange-correlation interactions involve electrons at different energies and hence a self-consistent multi-energy-group solution of the Schr\{o}dinger-Poisson system is required. It is shown here that the existence of a limiting density-dependent potential at low applied voltages allows calculation of the field emission current. Despite additional interactions, a Fowler-Nordheim behaviour is observed. It is also found that the exchange-correlation potential dominates at these voltages in nanogaps and possibly leads to a higher turn-on voltage.
Keywords
Cite
@article{arxiv.1310.2776,
title = {Calculating field emission currents in nanodiodes - a multi-group formalism with space charge and exchange-correlation effects},
author = {Debabrata Biswas and Raghwendra Kumar},
journal= {arXiv preprint arXiv:1310.2776},
year = {2018}
}
Comments
This article has been accepted by Journal of Applied Physics. After it is published, it will be found at http://scitation.aip.org/content/aip/journal/jap