Measurements on single-crystal metal photocathodes reveal an additional near-threshold emission process attributed to momentum-resonant Umklapp scattering, with a first-principles model matching observed quantum efficiency and mean transverse energy.
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Evidence for Umklapp electron scattering emission from metal photocathodes
Measurements on single-crystal metal photocathodes reveal an additional near-threshold emission process attributed to momentum-resonant Umklapp scattering, with a first-principles model matching observed quantum efficiency and mean transverse energy.