PbTe(111) Sub-Thermionic Photocathode: A Route to High-Quality Electron Pulses

Li, Tuo; Schroeder, W. Andreas

PbTe(111) Sub-Thermionic Photocathode: A Route to High-Quality Electron Pulses

Apr 1, 2017

6 pages

e-Print:

1704.00194 [physics.acc-ph]

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Abstract: (arXiv)

The emission properties of PbTe(111) single crystal have been extensively investigated to demonstrate that PbTe(111) is a promising low root mean square transverse momentum ({\Delta}p

_T

) and high brightness photocathode. The density functional theory (DFT) based photoemission analysis successfully elucidates that the 'hole-like' {\Lambda}

^+_6

energy band in the

L

valley with low effective mass

m^*

results in low {\Delta}p

_T

. Especially, as a 300K solid planar photocathode, Te-terminated PbTe(111) single crystal is expected to be a potential 50K electron source.

Note:

DFT Calculations, PbTe(111), Photoemission, Photocathodes, Statistical Modeling, Band Structure, Fermi Surface

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