title: Temperature dependence of the electronic structure and Fermi-surface reconstruction of Eu(1-x)Gd(x)O through the ferromagnetic metal-insulator transition.
abstract: We present angle-resolved photoemission spectroscopy of Eu(1-x)Gd(x)O through the ferromagnetic metal-insulator transition. In the ferromagnetic phase, we observe Fermi surface pockets at the Brillouin zone boundary, consistent with density functional theory, which predicts a half-metal. Upon warming into the paramagnetic state, our results reveal a strong momentum-dependent evolution of the electronic structure, where the metallic states at the zone boundary are replaced by pseudogapped states at the Brillouin zone center due to the absence of magnetic long-range order of the Eu 4f moments.
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Shai
authors.forename: A J
authors.initials: AJ
authors.lastname: Melville
authors.forename: J W
authors.initials: JW
authors.lastname: Harter
authors.forename: E J
authors.initials: EJ
authors.lastname: Monkman
authors.forename: D W
authors.initials: DW
authors.lastname: Shen
authors.forename: A
authors.initials: A
authors.lastname: Schmehl
authors.forename: D G
authors.initials: DG
authors.lastname: Schlom
authors.forename: K M
authors.initials: KM
authors.lastname: Shen