Calculating field emission current in nanodiodes—A multi-group formalism with space charge and exchange-correlation effects
- Theoretical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
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.
- OSTI ID:
- 22271226
- Journal Information:
- Journal of Applied Physics, Vol. 115, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Space-charge-limited flows in the quantum regime
Structural tuning of nanogaps using electromigration induced by field emission current with bipolar biasing