Angle-resolved photoemission study of NbC(100): Theory and experiment

The electronic band structure of NbC_0.83 has been investigated with angle-resolved photoelectron spectroscopy using HeI, NeI and ArI radiation. Experiments were carried out on the (100) surface with the emission azimuth lying in the (001) and the (01) symmetry planes. The experimental data are compared with theoretical spectra for NbC_1.0(100). The results show that most of the structures observed in the experimental spectra can be well explained by the bulk energy band structure of NbC_1.0. The large differences observed when comparing the spectra obtained in the two emission planes are discussed.