Spin-resolved PES and IPES investigation of the graphene/Ni(111) interface

The chemically inert graphene/Ni(111) interface represents an intriguing system where a magnetic sample is protected by a single layer of carbon atoms, which passivates the surface. Despite the fact that it has been the subject matter of many researches, inverse photoemission (IPES) data are still missing as well as a comparison with spin-resolved photoemission (SR-PES) spectra. Here, for the sake of completeness, we present both in situ SR-PES and SR-IPES spectra. We observe that normal emission and normal incidence data are dominated by the Ni features while characteristic signals from carbon arise at higher angles. The spin polarization of Ni bands, investigated here along the (Formula presented.) - (Formula presented.) direction of the surface Brillouin zone, is only slightly affected by the graphene overlayer in both filled and empty states.