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Auger electron emission initiated by the creation of valence-band holes in graphene by positron annihilation

Author

Listed:
  • V. A. Chirayath

    (University of Texas at Arlington)

  • V. Callewaert

    (Universiteit Antwerpen)

  • A. J. Fairchild

    (University of Texas at Arlington)

  • M. D. Chrysler

    (University of Texas at Arlington)

  • R. W. Gladen

    (University of Texas at Arlington)

  • A. D. Mcdonald

    (University of Texas at Arlington)

  • S. K. Imam

    (University of Texas at Arlington)

  • K. Shastry

    (University of Texas at Arlington
    R.V. College of Engineering)

  • A. R. Koymen

    (University of Texas at Arlington)

  • R. Saniz

    (Universiteit Antwerpen)

  • B. Barbiellini

    (Northeastern University)

  • K. Rajeshwar

    (University of Texas at Arlington)

  • B. Partoens

    (Universiteit Antwerpen)

  • A. H. Weiss

    (University of Texas at Arlington)

Abstract

Auger processes involving the filling of holes in the valence band are thought to make important contributions to the low-energy photoelectron and secondary electron spectrum from many solids. However, measurements of the energy spectrum and the efficiency with which electrons are emitted in this process remain elusive due to a large unrelated background resulting from primary beam-induced secondary electrons. Here, we report the direct measurement of the energy spectra of electrons emitted from single layer graphene as a result of the decay of deep holes in the valence band. These measurements were made possible by eliminating competing backgrounds by employing low-energy positrons (

Suggested Citation

  • V. A. Chirayath & V. Callewaert & A. J. Fairchild & M. D. Chrysler & R. W. Gladen & A. D. Mcdonald & S. K. Imam & K. Shastry & A. R. Koymen & R. Saniz & B. Barbiellini & K. Rajeshwar & B. Partoens & A, 2017. "Auger electron emission initiated by the creation of valence-band holes in graphene by positron annihilation," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms16116
    DOI: 10.1038/ncomms16116
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