Abstract
The insulator/ferromagnet interface system of hexagonal boron nitride on Ni111 was investigated with spin- and angle-resolved inverse photoemission and spin-polarized secondary electron emission. We identified the theoretically predicted boron nitride BN interface state at 1.7 eV above the Fermi level. The interface state is found to be influenced by the ferromagnetic substrate, which is reflected in a magnetic exchange splitting of 130 50 meV. Parallel to the surface, it shows a free-electron-like Ek dispersion with an effective mass of 1.1 0.2me. Furthermore, we found a spectral feature at 2.2 eV above the Fermi level, which we attribute to indirect transitions into a region of high density of BN-induced states.
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