Valence-level structure of phosphides of 3d-metals on the basis of XRS and ESCA data

Examination of the Bonding in Binary Transition-Metal Monophosphides MP (M = Cr, Mn, Fe, Co) by X-Ray Photoelectron Spectroscopy

“…In contrast, the P 3p nonbonding peaks are narrow and their binding energies show little change. Interestingly, the binding energies of the P 3s states (near 12 eV) show only a slight shift on going from CrP to CoP, similar to that observed for the obviously nonbonding P 2p states, implying that they are less important than the 3p states in bonding interactions as has been suggested previously . The metal 3d states, split into t 2g and e g components, have similar energies as those in the valence-band spectra of the pure metals.…”

“…Interestingly, the binding energies of the P 3s states (near 12 eV) show only a slight shift on going from CrP to CoP, similar to that observed for the obviously nonbonding P 2p states, implying that they are less important than the 3p states in bonding interactions as has been suggested previously. 15 The metal 3d states, split into t 2g and e g components, have similar energies as those in the valenceband spectra of the pure metals. This verifies our earlier conclusion derived from analysis of the satellite structure in the metal 2p 3/2 core spectra of Co metal and CoP which showed that during the plasmon loss process in which the exiting photoelectrons interacted with the valence electrons of the metal atoms in the pure metal and in the monophosphide, the photoelectrons lost similar amounts of energy.…”

“…43 To fit the spectra presented in Figure 9 with both transition-metal and phosphorus states, they were compared to previously reported band structure calculations and XPS results. The region 15-10 eV below E F has been attributed to P 3s states 15 whereas the broad region above it (8-3 eV) has been attributed to P 3p bonding states. 18 The transitionmetal 3d states (containing both t 2g and e g components) have been suggested to lie close to E F along with P 3p nonbonding states having a similar to slightly lower binding energy.…”

“…The electronic structure of some first-row transition-metal monophosphides has been previously investigated with both experimental X-ray photoelectron spectroscopy (XPS) studies [15][16][17][18] and theoretical calculations. [11][12][13]19,20 Here we describe new high-resolution XPS measurements of CrP, MnP, FeP, and CoP, with the goal of clarifying the electronic structure and bonding in these important compounds.…”

Excitons and excitonic molecules in mixed Zn(P1−xAsx)2 crystals

“…Thus, the increase of h m occurs even faster, than decrease of e m . This fact becomes clear if to take into account, that in 2 ZnP conduction band originate mainly from Zn ions, and valence band -from P ions [19]. Therefore, substitution of P atoms by As atoms should first of all has an influence on parameters of a valence band, in particular on hole effective mass.…”