Photoemission studies of theγ−αphase transition in Ce: Changes in4fcharacter

Abstract

Photoemission studies of the $\gamma -\alpha$ phase transition in cerium show changes in two $4f$-related features in the valence band (0.3 and 2 eV below $E_F$) and broadening of the multiplet structure in the region of the $4d-4f$ transitions. We show that the observed features can be explained by increased hybridization of the $4f$ wave function upon entering the $\alpha$ phase.