title: Correlated electrons step by step: itinerant-to-localized transition of fe impurities in free-electron metal hosts.
abstract: High-resolution photoemission spectroscopy and ab initio calculations have been employed to analyze the onset and progression of d-sp hybridization in Fe impurities deposited on alkali metal films. The interplay between delocalization, mediated by the free-electron environment, and Coulomb interaction among d electrons gives rise to complex electronic configurations. The multiplet structure of a single Fe atom evolves and gradually dissolves into a quasiparticle peak near the Fermi level with increasing host electron density. The effective multiorbital impurity problem within the exact diagonalization scheme describes the whole range of hybridizations.
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, I-34012 Trieste, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Carbone
authors.forename: M
authors.initials: M
authors.lastname: Veronese
authors.forename: P
authors.initials: P
authors.lastname: Moras
authors.forename: S
authors.initials: S
authors.lastname: Gardonio
authors.forename: C
authors.initials: C
authors.lastname: Grazioli
authors.forename: P H
authors.initials: PH
authors.lastname: Zhou
authors.forename: O
authors.initials: O
authors.lastname: Rader
authors.forename: A
authors.initials: A
authors.lastname: Varykhalov
authors.forename: C
authors.initials: C
authors.lastname: Krull
authors.forename: T
authors.initials: T
authors.lastname: Balashov
authors.forename: A
authors.initials: A
authors.lastname: Mugarza
authors.forename: P
authors.initials: P
authors.lastname: Gambardella
authors.forename: S
authors.initials: S
authors.lastname: Lebègue
authors.forename: O
authors.initials: O
authors.lastname: Eriksson
authors.forename: M I
authors.initials: MI
authors.lastname: Katsnelson
authors.forename: A I
authors.initials: AI
authors.lastname: Lichtenstein