title: Quasiparticle mass enhancement and temperature dependence of the electronic structure of ferromagnetic SrRuO3 thin films.
abstract: We report high-resolution angle-resolved photoemission studies of epitaxial thin films of the correlated 4d transition metal oxide ferromagnet SrRuO(3). The Fermi surface in the ferromagnetic state consists of well-defined Landau quasiparticles exhibiting strong coupling to low-energy bosonic modes which contributes to the large effective masses observed by transport and thermodynamic measurements. Upon warming the material through its Curie temperature, we observe a substantial decrease in quasiparticle coherence but negligible changes in the ferromagnetic exchange splitting, suggesting that local moments play an important role in the ferromagnetism in SrRuO(3).
authors.affiliation: Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Shai
authors.forename: C
authors.initials: C
authors.lastname: Adamo
authors.forename: D W
authors.initials: DW
authors.lastname: Shen
authors.forename: C M
authors.initials: CM
authors.lastname: Brooks
authors.forename: J W
authors.initials: JW
authors.lastname: Harter
authors.forename: E J
authors.initials: EJ
authors.lastname: Monkman
authors.forename: B
authors.initials: B
authors.lastname: Burganov
authors.forename: D G
authors.initials: DG
authors.lastname: Schlom
authors.forename: K M
authors.initials: KM
authors.lastname: Shen