title: Coherence-incoherence crossover and the mass-renormalization puzzles in Sr(2)RuO(4).
abstract: We calculate the electronic structure of Sr(2)RuO(4), treating correlations within dynamical mean-field theory. The approach successfully reproduces several experimental results and explains the key properties of this material: the anisotropic mass renormalization of quasiparticles and the crossover into an incoherent regime above a low temperature scale. While the orbital differentiation originates from the proximity of the van Hove singularity, strong correlations are caused by the Hund's coupling. The generality of this mechanism for other correlated materials is pointed out.
authors.affiliation: Centre de Physique Théorique, École Polytechnique, CNRS, Palaiseau, France.
authors.forename: Jernej
authors.initials: J
authors.lastname: Mravlje
authors.forename: Markus
authors.initials: M
authors.lastname: Aichhorn
authors.forename: Takashi
authors.initials: T
authors.lastname: Miyake
authors.forename: Kristjan
authors.initials: K
authors.lastname: Haule
authors.forename: Gabriel
authors.initials: G
authors.lastname: Kotliar
authors.forename: Antoine
authors.initials: A
authors.lastname: Georges