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Self focusing of field emitted electrons at an ellipsoidal tip

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National Technical University of Athens   

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Self focusing of field emitted electrons at an ellipsoidal tip (EN)
Xanthakis, JP (EN)
Kirk, TL (EN)
Pescia, D (EN)
Kyritsakis, A (EN)
Kokkorakis, GC (EN)
journalArticle (EN)
2014-03-01T01:34:35Z
2010 (EN)
In models of field emission the needle is usually terminated by a hemispherical cap. Here we choose to terminate it with a hemiellipsoidal cap and use a three-dimensional Wentzel-Kramers-Brillouin method for the computations. This has two important consequences: as the ellipsoid becomes more elongated, (a) the effective emission area is decreased and (b) the quantum mechanically computed electron paths converge toward the needle axis. Both mechanisms produce a self-focusing of the field emitted electrons. (C) 2010 American Institute of Physics. [doi:10.1063/1.3462934] (EN)
Physics, Applied (EN)
Wentzel-Kramers-Brillouin method (EN)
semiconductor-metal boundaries (EN)
surface chemistry (EN)
Hemispherical cap (EN)
titanium (EN)
Emitted electron (EN)
chemical interdiffusion (EN)
solid-state phase transformations (EN)
Field emission (EN)
Electron path (EN)
ohmic contacts (EN)
work function (EN)
Self-focusing (EN)
Emission area (EN)
contact resistance (EN)
silicon compounds (EN)
tomography (EN)
Needles (EN)
Needle axis (EN)
transmission electron microscopy (EN)
wide band gap semiconductors (EN)
Applied Physics Letters (EN)
English
AMER INST PHYSICS (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
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