X-Ray Emission Spectra and Electronic Structures of Red Phosphorus, 3dTransition-Metal Phosphides and III–V Compounds

Abstract

The P K β emission spectra in fluorescence from red amorphous phosphorus, 3 d transition-metal phosphides TiP, CrP, FeP, Fe 2 P, Fe 3 P, CoP, Co 2 P, Ni 5 P 4 , Ni 2 P, Ni 3 P, Cu 3 P, ZnP 2 (black) and Zn 3 P 2 , and the semiconducting phosphides of the III-V type, BP, AlP, GaP and InP are measured with a high-resolution two-crystal vacuum spectrometer equipped with Ge(111) crystals. The influence of the metal atoms appears distinctly on the P K β fluorescence emission spectra. The measured spectra are compared with available X-ray emission and XPS valence-band spectra and theoretical energy-band calculations on a common energy scale. It is shown that considerable p - d , s mixing occurs in the valence bands of the 3 d transition-metal phosphides and the P 3 p states mix fairly with the P 3 s states in the valence bands of red phosphorus, Gap and InP