title: CaCrO3: an anomalous antiferromagnetic metallic oxide.
abstract: Combining infrared reflectivity, transport, susceptibility, and several diffraction techniques, we find compelling evidence that CaCrO3 is a rare case of a metallic and antiferromagnetic transition-metal oxide with a three-dimensional electronic structure. Local spin density approximation calculations correctly describe the metallic behavior as well as the anisotropic magnetic ordering pattern of C type: The high Cr valence state induces via sizable pd hybridization remarkably strong next-nearest-neighbor interactions stabilizing this ordering. The subtle balance of magnetic interactions gives rise to magnetoelastic coupling, explaining pronounced structural anomalies observed at the magnetic ordering transition.
authors.affiliation: II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, Köln, Germany.
authors.forename: A C
authors.initials: AC
authors.lastname: Komarek
authors.forename: S V
authors.initials: SV
authors.lastname: Streltsov
authors.forename: M
authors.initials: M
authors.lastname: Isobe
authors.forename: T
authors.initials: T
authors.lastname: Möller
authors.forename: M
authors.initials: M
authors.lastname: Hoelzel
authors.forename: A
authors.initials: A
authors.lastname: Senyshyn
authors.forename: D
authors.initials: D
authors.lastname: Trots
authors.forename: M T
authors.initials: MT
authors.lastname: Fernández-Díaz
authors.forename: T
authors.initials: T
authors.lastname: Hansen
authors.forename: H
authors.initials: H
authors.lastname: Gotou
authors.forename: T
authors.initials: T
authors.lastname: Yagi
authors.forename: Y
authors.initials: Y
authors.lastname: Ueda
authors.forename: V I
authors.initials: VI
authors.lastname: Anisimov
authors.forename: M
authors.initials: M
authors.lastname: Grüninger
authors.forename: D I
authors.initials: DI
authors.lastname: Khomskii
authors.forename: M
authors.initials: M
authors.lastname: Braden