Reexamination of tests of the Wannier threshold law for two-electron escape

1992 ◽  
Vol 46 (1) ◽  
pp. 652-655 ◽  
Author(s):  
J. R. Friedman ◽  
X. Q. Guo ◽  
M. S. Lubell ◽  
M. R. Frankel
Keyword(s):  
Electron Escape ◽  
Wannier Threshold

Exploration on performance of two-dimensional GaN photocathodes with uniform-doping and variable-doping structure

2021 ◽  
Author(s):  
Liangbo Huang ◽  
Jian Tian ◽  
Lei Liu ◽  
Ruxiao Di ◽  
Zihao Zhu
Keyword(s):  
Optical Properties ◽  
Work Function ◽  
Formation Energy ◽  
Electron Transition ◽  
Two Dimensional ◽  
Density Of State ◽  
Electron Escape ◽  
The Stability ◽  
Function Density ◽  
Uniform Doping

In this paper, the properties of two-dimensional (2D) gallium nitride (GaN) photocathodes with a uniform doping and variable doping structure are studied by using Mg as a doping element based on first principles. The stability, bandstructure, work function, density of state and optical properties of the GaN bilayer and GaN trilayer in two-doped ways are investigated. The results show that formation energy of variable doping structure is less than that of the uniform doping structure, which means that the variable doping structure is more stable. At the same time, the formation energy increases with increase of layers. The pristine GaN bilayer has an indirect bandgap, while the doped GaN bilayer transforms into a direct bandgap. The impurity levels appear in a forbidden band of doped GaN trilayers, which is favorable for electron transition. The results of work function reveal that variable doping structure has lower vacuum barriers and more electron escape numbers, which proves that it can improve the quantum efficiency of photocathodes. Finally, the analysis of optical properties shows that the uniform doping structure has better optical properties than that of the variable doping structure.

scholarly journals Low-Energy Electron Escape from Liquid Interfaces: Charge and Quantum Effects

2020 ◽  
Vol 124 (1) ◽  
Author(s):  
Loren Ban ◽  
Thomas E. Gartmann ◽  
Bruce L. Yoder ◽  
R. Signorell
Keyword(s):  
Quantum Effects ◽  
Low Energy ◽  
Energy Electron ◽  
Liquid Interfaces ◽  
Electron Escape ◽  
Low Energy Electron

Plasmon effects on the Wannier threshold law in hot quantum plasmas

2008 ◽  
Vol 78 (1) ◽  
pp. 015502 ◽  
Author(s):  
Sung-Han Kim ◽  
Young-Dae Jung
Keyword(s):  
Quantum Plasmas ◽  
Wannier Threshold
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