Author/Authors :
Mossanek، نويسنده , , R.J.O. and Preda، نويسنده , , I. and Abbate، نويسنده , , M. and Rubio-Zuazo، نويسنده , , J. and Castro، نويسنده , , G.R. and Vollmer، نويسنده , , A. and Gutiérrez، نويسنده , , A. and Soriano، نويسنده , , L.، نويسنده ,
Abstract :
We studied the Ni 2p core-level spectra of NiO using cluster model calculations and X-ray photoemission spectra. The calculations were performed for a NiO6, a NiO5, and a NiO6:NiO5 cluster, which allows studying the bulk, the surface, and the non-local effects in the spectra. The photoemission spectra were taken with soft (or hard) X-rays to enhance the surface (or bulk) contribution. The calculation shows that both surface and non-local-effects contribute to the shoulder in the experimental data. The photoemission spectra show that the relative intensity of the surface contribution decreases for Hard X-rays.
