title: Low-energy models for correlated materials: bandwidth renormalization from Coulombic screening.
abstract: We provide a prescription for constructing Hamiltonians representing the low-energy physics of correlated electron materials with dynamically screened Coulomb interactions. The key feature is a renormalization of the hopping and hybridization parameters by the processes that lead to the dynamical screening. The renormalization is shown to be non-negligible for various classes of correlated electron materials. The bandwidth reduction effect is necessary for connecting models to materials behavior and for making quantitative predictions for low-energy properties of solids.
authors.affiliation: CNRS and Institut de Minéralogie et de Physique des Milieux condensés, Université Pierre et Marie Curie, Paris, France.
authors.forename: M
authors.initials: M
authors.lastname: Casula
authors.forename: Ph
authors.initials: P
authors.lastname: Werner
authors.forename: L
authors.initials: L
authors.lastname: Vaugier
authors.forename: F
authors.initials: F
authors.lastname: Aryasetiawan
authors.forename: T
authors.initials: T
authors.lastname: Miyake
authors.forename: A J
authors.initials: AJ
authors.lastname: Millis
authors.forename: S
authors.initials: S
authors.lastname: Biermann