B. Hernnas et al., OBSERVATION OF CO-METAL HYBRIDIZATION IN NI 2P X-RAY-ABSORPTION AND X-RAY-PHOTOEMISSION SPECTRA, Physical review. B, Condensed matter, 47(23), 1993, pp. 16052-16055
The adsorption of CO has been studied on a Ni monolayer on Cu(100). Th
e change in the Ni surface electronic structure upon CO adsorption is
manifested in a broadening and appearance of new states in the Ni 2p x
-ray absorption spectra. From a comparison with inverse photoemission
spectra these states can be described as Ni 3d-CO 2pi hybrids. The Ni
-CO hybridization is also seen to perturb the multiplets in the 2p(5)3
d9 photoemission satellite.