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Eur. Phys. J. B (2013) 86: 225.
Thorben Haarlammert, Luca Bignardi, Carsten Winter, Gerhard Fecher, Petra Rudolf, Helmut Zacharias.
Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany and
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands and
Institut of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany .
Abstract
Photon-energy dependent photoemission experiments using high harmonic radiation as a tunable photon source on epitaxially grown graphene on a Ni(111) substrate are presented. A resonance in the photoemission cross section for theσ and π states of graphene was observed and compared to a simple model for the determination of photoemission cross sections of free standing graphene, pointing out the role of the interaction of graphene with the nickel substrate.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013
