skip to main content

SciTech ConnectSciTech Connect

Title: Calculating field emission current in nanodiodes—A multi-group formalism with space charge and exchange-correlation effects

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 interaction involve electrons at different energies and hence a self-consistent multi-energy-group solution of the Schrödinger-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.
Authors:
;  [1]
  1. Theoretical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
Publication Date:
OSTI Identifier:
22271226
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CORRELATIONS; DENSITY; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; ELECTRON-ELECTRON COUPLING; ELECTRONS; FIELD EMISSION; NANOSTRUCTURES; POTENTIALS; SEMICONDUCTOR DIODES; SPACE CHARGE