title: The alpha--> gamma transition in Ce: a theoretical view from optical spectroscopy.
abstract: Using a novel approach to calculate optical properties of strongly correlated systems, we address the old question of the physical origin of the alpha--> gamma transition in Ce. We find that the Kondo collapse model, involving both the f and the spd electrons, describes the optical data better than a Mott transition picture involving the f electrons only. Our results compare well with existing experiments on thin films. We predict the full temperature dependence of the optical spectra and find the development of a hybridization pseudogap in the vicinity of the alpha--> gamma phase transition.
authors.affiliation: Jozef Stefan Institute, SI-1000 Ljubljana, Slovenia and Department of Physics and Center for Material Theory, Rutgers University, Piscataway, NJ 08854, USA.
authors.forename: Kristjan
authors.initials: K
authors.lastname: Haule
authors.forename: Viktor
authors.initials: V
authors.lastname: Oudovenko
authors.forename: Sergej Y
authors.initials: SY
authors.lastname: Savrasov
authors.forename: Gabriel
authors.initials: G
authors.lastname: Kotliar