Surface photovoltage effect on clean and negative electron-affinity surfaces of GaAs and its superlattice

Physics

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Electron Sources, Polarized Beams, Photomultipliers, Phototubes And Photocathodes, Relativistic Electron And Positron Beams

Scientific paper

Photoelectron spectroscopy with the combination of synchrotron radiation and laser has been used for exploring the surface photovoltage effect of GaAs photocathodes. It has been observed that the laser induced surface photovoltage causes core-level shifts of photoelectron spectra without any spectral change. The surface photovoltage effects for core-levels and its temporal profiles on clean and negative electron-affinity surfaces of GaAs (100) and GaAs/GaAsP superlattice are reported. .

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