title: Direct observation of t2g orbital ordering in magnetite.
abstract: Using soft-x-ray diffraction at the site-specific resonances in the Fe L2,3 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show directly that the (001/2) diffraction peak (in cubic notation) is caused by t2g orbital ordering at octahedral Fe2+ sites and the (001) by a spatial modulation of the t2g occupation.
authors.affiliation: II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Schlappa
authors.forename: C
authors.initials: C
authors.lastname: Schüssler-Langeheine
authors.forename: C F
authors.initials: CF
authors.lastname: Chang
authors.forename: H
authors.initials: H
authors.lastname: Ott
authors.forename: A
authors.initials: A
authors.lastname: Tanaka
authors.forename: Z
authors.initials: Z
authors.lastname: Hu
authors.forename: M W
authors.initials: MW
authors.lastname: Haverkort
authors.forename: E
authors.initials: E
authors.lastname: Schierle
authors.forename: E
authors.initials: E
authors.lastname: Weschke
authors.forename: G
authors.initials: G
authors.lastname: Kaindl
authors.forename: L H
authors.initials: LH
authors.lastname: Tjeng