Double photoemission from Ag and Pd surfaces: Energy relations

Schumann, F. O.; Aliaev, Y.; Kostanovskiy, Ilya; Kirschner, J.

doi:10.1103/PhysRevB.101.115104

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Double photoemission from Ag and Pd surfaces: Energy relations

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Schumann, F. O.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Aliaev, Y.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Kostanovskiy, Ilya
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Kirschner, J.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Schumann, F. O., Aliaev, Y., Kostanovskiy, I., & Kirschner, J. (2020). Double photoemission from Ag and Pd surfaces: Energy relations. Physical Review B, 101(11): 115104. doi:10.1103/PhysRevB.101.115104.

Cite as: https://hdl.handle.net/21.11116/0000-0008-7ECC-6

Abstract

We have investigated the electron pair emission due to single-photon absorption from Ag(100) and Pd(100) surfaces. We are interested in the energy spectra of pairs in particular near the energy cutoff. The sum energy spectra of Ag display a distinctive photon energy dependence. We also observe some fine structure. Near the high-energy cutoff the coincidence rate is too low to determine the energy position of the cutoff. Nevertheless we observe a finite signal if two 5sp electrons near the Fermi level are emitted. For Pd(100) we find sum energy spectra without fine structure and the cutoff region is approached linearly. Within the experimental accuracy the minimum energy to liberate two electrons is twice the work function.