title: Charge-orbital ordering and Verwey transition in magnetite measured by resonant soft X-ray scattering.
abstract: We report experimental evidence for the charge-orbital ordering in magnetite below the Verwey transition temperature T(V). Measurements of O K-edge resonant x-ray scattering on magnetite reveal that the O 2p states in the vicinity of the Fermi level exhibit a charge-orbital ordering along the c axis with a spatial periodicity of the doubled lattice parameter of the undistorted cubic phase. Such a charge-orbital ordering vanishes abruptly above T(V) and exhibits a thermal hysteresis, correlating closely with the Verwey transition in magnetite.
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan. djhuang@nsrrc.org.tw
authors.forename: D J
authors.initials: DJ
authors.lastname: Huang
authors.forename: H-J
authors.initials: HJ
authors.lastname: Lin
authors.forename: J
authors.initials: J
authors.lastname: Okamoto
authors.forename: K S
authors.initials: KS
authors.lastname: Chao
authors.forename: H-T
authors.initials: HT
authors.lastname: Jeng
authors.forename: G Y
authors.initials: GY
authors.lastname: Guo
authors.forename: C-H
authors.initials: CH
authors.lastname: Hsu
authors.forename: C-M
authors.initials: CM
authors.lastname: Huang
authors.forename: D C
authors.initials: DC
authors.lastname: Ling
authors.forename: W B
authors.initials: WB
authors.lastname: Wu
authors.forename: C S
authors.initials: CS
authors.lastname: Yang
authors.forename: C T
authors.initials: CT
authors.lastname: Chen