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Secondary electron spectra of graphene on Ni(111) surface
M Pisarra1, A Cupolillo, L S Caputi
1Dipartimento di Fisica, Università della Calabria and INFN-Gruppo collegato di Cosenza-Via P Bucci cubo 33C, Arcavacata di Rende, Cosenza, Italy.
Abstract:
We report on kinetic energy distributions of electrons emitted during bombardment of graphene adsorbed on a Ni(111) surface by 0.5-0.9 keV electrons. The spectra reveal several peaks superimposed on the background of cascade electrons. The position of these peaks does not depend significantly on primary electron energy but show a remarkable angular dependence, indicating that they are directly related to the empty bands above the vacuum level of the sample.
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