Abstract
The valence band structure of CrBr3 has been obtained by ultraviolet and X-ray photoelectron spectroscopy. The comparison of the X-ray photoemission valence band spectrum with published band calculations for the ground state within a one-electron formalism shows satisfactory agreement between observed and calculated structures. The contribution of the Cr 3d electrons relative to that of the Br 4p electrons in the photoemission energy distribution has been evaluated and compared with the ratio of photoionization cross sections for Kr 4p6 (calculated) and Cu 3d10 (experimental) at 40.8 eV. The degree of the p/d hybridization has then been estimated to be around 10-15%.
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