Satellite structure in photoelectron spectra of CrCl3

Satellite structures detected in Cr3s, Cr3p core-levels and valence band X- ray photoelectron spectra of CrCl3 insulators have been discussed within th e cluster model approach. It turns out that the effective hybridisation (T- eff congruent to 3.7 eV) can be sufficient to account for the main peak-sat ellite splitting in the valence band region. The photoconductivity band gap in CrCl3 is essentially of d-d type, although the Cr 3d main emission may be due to weakly mixed 3d(2) and 3d(3)L(1) final stare configurations. Howe ver, although the intrinsic satellite structure in Cr3s and Cr3p core level s may originate from a charge transfer process, competition with the excito n mechanism for the origin of satellites should be considered, when the sat ellite energy distance from the main line becomes large. (C) 2000 Elsevier Science Ltd. All rights reserved.