Effects of spatial averaging on the ARPES spectra of graphene

ORAL

Abstract

We report on an ARPES nanoscope investigation (nano-ARPES) and demonstrate that spatial averaging of ARPES data, even on a single graphene domain, lead to apparent kinks in the dispersion relation as well as variations of the MDC widths with binding energy that do not appear in the spectra acquired on a very small spot (below 100nm X 100nm). At the same time, we show that the electronic dispersion relation of our graphene sample is perfectly linear while the MDC widths do not display a simple dependence with the binding energy.

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Authors

  • Frederic Joucken

    • University of Namur

  • Nicolas Reckinger

    • University of Namur

  • Jose Avila

    • Soleil synchrotron

  • Maria Carmen Asensio

    • Soleil Synchrotron

  • J\'er\^ome Lagoute

    • Universit\'e Paris 7 - Paris Diderot

  • Jean-Fran\c{c}ois Colomer

    • University of Namur

  • Jacques Ghijsen

    • University of Namur

  • Robert Sporken

    • University of Namur