| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kyritsakis, Andreas
University of Tartu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Polarization characteristics and structural modifications of Cu nanoparticles under high electric fields
- 2023Biased self-diffusion on Cu surface due to electric field gradientscitations
- 2023Critical review on experimental and theoretical studies of elastic properties of wurtzite-structured ZnO nanowirescitations
- 2022Thermal, Mechanical, and Acoustic Properties of Polydimethylsiloxane Filled with Hollow Glass Microspherescitations
- 2022Biased self-diffusion on Cu surface due to electric field gradientscitations
- 2020Tungsten migration energy barriers for surface diffusioncitations
- 2019Ab initio calculation of field emission from metal surfaces with atomic-scale defectscitations
- 2016Atomistic modeling of metal surfaces under high electric fieldscitations
- 2016Effects of control oxide material on the charging times of metal nanoparticles inside non-volatile memories
- 2016Extension of the general thermal field equation for nanosized emitterscitations
Places of action
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article
Ab initio calculation of field emission from metal surfaces with atomic-scale defects
Abstract
In this work we combine density functional theory and quantum transport calculations to study the influence of atomic-scale defects on the work function and field emission characteristics of metal surfaces. We develop a general methodology for the calculation of the field emitted current density from nanofeatured surfaces, which is then used to study specific defects on a Cu(111) surface. Our results show that the inclusion of a defect can significantly locally enhance the field emitted current density. However, this increase is attributed solely to the decrease of the work function due to the defect, with the effective field enhancement being minute. Finally, the Fowler-Nordheim equation is found to be valid when the modified value for the work function is used, with only an approximately constant factor separating the computed currents from those predicted by the Fowler-Nordheim equation. ; Peer reviewed