title: Spin-dependent on-site electron correlations and localization in itinerant ferromagnets.
abstract: Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to probe electron correlation in ferromagnetic thin films. In particular, exploiting the AR-APECS capability to discriminate Auger electron emission events characterized by valence hole pairs created either in the high or in the low total spin state, a strong correlation effect in the Fe M(2,3)VV Auger line shape (measured in coincidence with the Fe 3p photoelectrons) of Fe/Cu(001) thin films is detected and ascribed to interactions within the majority spin subband. Such an assignment follows from a close comparison of the experimental AR-APECS line shapes with the predictions of a model based on spin polarized density functional theory and the Cini-Sawatzky approach.
authors.affiliation: CNR, Istituto Officina dei Materiali, Basovizza-Trieste, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Gotter
authors.forename: G
authors.initials: G
authors.lastname: Fratesi
authors.forename: R A
authors.initials: RA
authors.lastname: Bartynski
authors.forename: F
authors.initials: F
authors.lastname: Da Pieve
authors.forename: F
authors.initials: F
authors.lastname: Offi
authors.forename: A
authors.initials: A
authors.lastname: Ruocco
authors.forename: S
authors.initials: S
authors.lastname: Ugenti
authors.forename: M I
authors.initials: MI
authors.lastname: Trioni
authors.forename: G P
authors.initials: GP
authors.lastname: Brivio
authors.forename: G
authors.initials: G
authors.lastname: Stefani