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With a large-area field electron emitter, when an individual post-like emitter is sufficiently resistive, and current through it sufficiently large, then voltage loss occurs along it. This conference presentation provides a simple analytical and conceptual demonstration that this voltage loss is directly and inextricably linked to a reduction in the field enhancement factor (FEF) at the post apex,...
In this work, we analyze properties of cold field emission from a low-dimensional, paraboloidal emitter tip. We find that the entirety of the emitted current density (ECD) originates from a few high-energy, zero-angular-momentum subbands and from a region on the tip that is highly localized around the apex. In addition, Fowler-Nordheim (FN) plots for such emitters are non-linear and do not serve as...
A new model of low-field electron emission is proposed, presumably applicable for nanostructured materials possessing neither the quality of low work function nor capability of field enhancement at high-aspect-ratio elements. In accordance with the model, hot-electron emission is ultimately driven by thermoelectric phenomena developing near nanosized emission centers. Numerical estimates were performed...
SmB6 is believed as an ideal candidate for FE applications because of their unique properties. Up to date, the effect of image potential on the field emission (FE) behaviors of one-dimensional nanostructures is still unclear in experiments, and thus it becomes a challenging issue for the researchers. In this paper, the effect of image potential on FE properties of SmB6 nanowires are detailed studied...
We have continued our investigation of the tunneling currents between CNTs dispersed randomly in the 3-dimensional potential of a dielectric medium. In addition to the configurations of CNTs which give a 2 orders of magnitude higher current than the standard tip to tip configuration studied previously we have discovered CNT configurations which do the opposite i.e. give currents which are 2 orders...
The classical equations for describing the electron current density due to field and thermal emission from planar surfaces are unsuitable for modern nanometer-scale emitters. The planar equations are often presented in the form of Murphy and Good who, in their seminal paper [1], provided a method for deriving both the Fowler-Nordheim (FN) and Richardson-Schottky (RS) equations for field and thermal...
We propose a mathematical model for calculation of performance of field-emission cells. Demonstrated model allow calculating electrical potential distribution, trajectories of the emitted electrons and cell currents. Three different constructions of cell were examined. The main important features for cell performance were defined through the model. We assume that using this model will allow to simplify...
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