Emission properties of body-centered cubic elemental metal photocathodes

A first principles analysis of photoemission is developed to explain the lower than expected rms transverse electron momentum measured using the solenoid scan technique for the body-centered cubic Group Vb (V, Nb, and Ta) and Group VIb (Cr, Mo, and W) metallic photocathodes. The density functional t...

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Veröffentlicht in:Journal of applied physics 2015-04, Vol.117 (13)
Hauptverfasser: Li, Tuo, Rickman, Benjamin L., Schroeder, W. Andreas
Format: Artikel
Sprache:eng
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Zusammenfassung:A first principles analysis of photoemission is developed to explain the lower than expected rms transverse electron momentum measured using the solenoid scan technique for the body-centered cubic Group Vb (V, Nb, and Ta) and Group VIb (Cr, Mo, and W) metallic photocathodes. The density functional theory based analysis elucidates the fundamental role that the electronic band structure (and its dispersion) plays in determining the emission properties of solid-state photocathodes and includes evaluation of work function anisotropy using a thin-slab method.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4916598