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  Triple electron emission from surfaces: Energy and angle relations

Schumann, F. O., & Kirschner, J. (2021). Triple electron emission from surfaces: Energy and angle relations. Physical Review B, 103(7): 075103. doi:10.1103/PhysRevB.103.075103.

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PhysRevB.103.075103.pdf (Publisher version), 913KB
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PhysRevB.103.075103.pdf
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https://doi.org/10.1103/PhysRevB.103.075103 (Publisher version)
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 Creators:
Schumann, Frank O.1, Author              
Kirschner, Jürgen1, Author              
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1Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              

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 Abstract: We discuss a proof-of-principle experiment in which we detect triple electron emission from a surface due to primary electron impact. The new aspect is the ability to record the energies and emission directions of the ejected electrons. We selected NiO films as a target, which have shown in previous electron pair emission studies to give an enhanced intensity compared to other materials. The triple sum energy spectrum displays a shape consistent with a self-convolution of the electronic density of states. We define two different emission geometries. While the energy distributions are essentially identical, the intensity levels differ by a factor of 2. Imposing a geometrical constraint on one of the emitted triples shows that the available energy is equally shared among the other two electrons. We discuss our findings within a simplified scattering model. We also present angular distributions. Prominent intensity minima for electron emission in the same direction are not observed in contrast to our previous electron pair emission studies.

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 Dates: 2021-02-01
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: BibTex Citekey: P14023
DOI: 10.1103/PhysRevB.103.075103
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 103 (7) Sequence Number: 075103 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008