Data di Pubblicazione:
2003
Citazione:
Electron correlation and hybridization in late-transition-metal compounds / I. Pollini. - In: PHILOSOPHICAL MAGAZINE. - ISSN 1478-6435. - 83:6(2003), pp. 775-787.
Abstract:
In this article we discuss the transition-metal d-d Coulomb interaction U and the anion-to-cation charge transfer energy Delta for nickel halides and relate these to the observed bandgaps. In addition, we describe the degree of hybridization for NiCl2 and NiBr2 and transition-metal chlorides by considering the ionicity of the chemical bond of these compounds and the results obtained with the Phillips-Van Vechten dielectric theory. The degree of hybridization in transition-metal chlorides has been obtained by considering a simple model which utilizes the photon energy dependence of the photoionization cross-sections for the 3p band of the chlorine ions and the 3d band of the transition-metal ions. Good agreement between the two approaches has been found and a degree of hybridization between 0.15 and 0.25 for transition-metal chlorides is confirmed.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
binding energy; bonds (chemical); charge transfer states; electron correlations; electronic density of states; energy gap; nickel compounds; photoionisation
Elenco autori:
I. Pollini
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