Abstract
The electronic structure of single-crystal CeAg 2Ge 2 has been investigated by using angle-resolved photoelectron spectroscopy with synchrotron radiation at different photon energies ranging from 21 eV to 35 eV. Experimental energy bands have been mapped from the normal-emission photoelectron spectra of the CeAg 2Ge 2 (001) surface along the Γ – Z direction. Four photoemission features are observed to show the dispersion. The experimental spectra have been interpreted with the help of calculations based on the full potential linear augmented plane wave method using density functional theory. Excellent agreement has been obtained between the theory and the experiment. The bands that show dispersion are mainly related to the Ce 4f states and the hybridized Ag 4d with Ge 4p states and the bands that does not show any dispersion along the Γ – Z direction are the hybridized Ce 4f states and the Ag 4d states.
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