P. Poncharal

Does a field emitter have a transverse energy?

Salvador Barranco Cárceles, Pascal Vincent, Sorin Perisanu, P. Poncharal et autres

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Is the linear relationship between the slope and intercept observed in field emission S-K plots an artifact?

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

The performance of field emitters is usually analyzed by linear fitting of a Fowler–Nordheim plot. It has sometimes been observed that the fitted slopes and intercepts show a strong correlation, but no convincing explanation has been provided. We propose a simple model …

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Origin of the Slope-Intercept Linear Relationship in Field Emission

Anthony Ayari, Pascal Vincen, S. Perisanu, P. Poncharal et autres

Field emitters are often analyzed by linear fitting of a Fowler-Nordheim plot. The fitted slopes and intercepts can show a strong correlation, but its origin remains unclear. We propose a simple model showing that this correlation is due to fluctuations in the …

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Erratum: “All field emission experiments are noisy, … are any meaningful?” [J. Vac. Sci. Technol. B 41, 024001 (2023)]

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

This is a correction to: All field emission experiments are noisy, … are any meaningful?

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How Accurate is a Field Emission Experiment?

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

Even though the Fowler-Nordheim theory is almost 100 years old, the characterization of field emitters is not always very reliable. A common belief in the community is that the estimated values of the work function, emission area and field enhancement factor are …

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Electromechanical resonances and field-emission-induced self-oscillations of single crystal diamond needles

Victor I. Kleshch, Р. Р. Исмагилов, Vsevolod V. Mukhin, Anton S. Orekhov et autres

Due to its outstanding mechanical characteristics, diamond is an ideal material for use in micro- and nano-electromechanical systems. In this paper, we report on the investigation of vibrational properties of singly clamped needlelike diamond microcrystallites with nanoscale tips. The single-crystal diamond needles …

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All field emission experiments are noisy, … are any meaningful?

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

Representing field emission data on a Fowler–Nordheim plot is both very common and strongly not recommended. It leads to a spurious estimation of the emitter parameters despite a very good data fit. There is a lack of a reliable method of analysis …

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Negative differential resistance in photoassisted field emission from Si nanowires

M. Choueib, Arnaud Derouet, Pascal Vincent, Anthony Ayari et autres

Field emission (FE) from semiconducting nanowires (NWs) is studied for expanding electron gun performances and functionality in terms of stability, brightness, and pulsed emission. Here, we report on a pronounced and robust double negative differential resistance (NDR) in the FE IV characteristics …

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All field emission models are wrong, … but are any of them useful?

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

Field emission data are often represented on a Fowler–Nordheim plot but a new empirical equation has been recently proposed to better analyze experiments. Such an equation is based on approximations of the Murphy and Good model and predicts that a constant parameter …

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Field Emission from the Edges of Single-Layer Graphene

S. T. Purcell, Premkumar Vincent, S. Perisanu, Anthony Ayari et autres

This chapter presents experimental emission studies and analysis on well characterized, “closer to ideal,” individual single-layer graphene edges in ultra high vacuum in an attempt to approach theoretical predictions and experimental realizations. The edges of graphene were fairly quickly considered for field …

Electromechanical Self-Oscillations of Carbon Field Emitters

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

The spontaneous generation of AC currents and vibrations in field emitters based on carbon compounds is now a well-studied effect. This chapter overviews the different experimental realizations of the self-oscillations and of the different proposed mechanisms. It specially emphasizes their state-of-the-art performances …

Does a banal tungsten field emitter obey the field emission theory?

Anthony Ayari, Pascal Vincent, S. Perisanu, P. Poncharal et autres

Prompt by new theoretical propositions challenging the Fowler-Nordheim theory, we carried out field emission studies on the archetypal tungsten tip in a UHV environment. We tried different characterization methods in order to extract physical parameters more reliably. However, the different methods proposed …

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