Orbital Ordering and Resonant X-ray Scattering in Layered Manganites

Abstract

In layered manganites with orbital and charge orderings, the degeneracy of the Mn $4p$ orbitals as well as the $3d$ ones is lifted by the effects of the $4p$ bands and the local Coulomb interactions. We formulate the atomic scattering factor for the resonant x-ray scattering in the memory function method by taking into account these effects on an equal footing. It is shown that the polarization dependences of the scattering intensities at the orbital and charge superlattice reflections observed in LaSr${}_2$Mn${}_2$O${}_7$ are caused by the local and itinerant characters of $4p$ electrons, respectively. We examine the type of the orbital ordered state.

4 pages, 3 figures

References in corpus (2)

• Interplay between charge, orbital and magnetic order in Pr_{1-x}Ca_xMnO_3
• Charge Ordering and Phase Competition in the Layered Perovskite Lasr2mn2o7

Cited by in corpus (8)

• X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr${}_{1-x}$Ca${}_x$MnO${}_3$
• Resonant X-ray Scattering in Manganites - Study of Orbital Degree of Freedom -
• The implications of resonant x-ray scattering data on the physics of the insulating phase of V${}_2$O${}_3$
• Variable-range-hopping conductivity of half-doped bilayer manganite LaSr${}_2$Mn${}_2$O${}_7$
• Manganites at Quarter Filling: Role of Jahn-Teller Interactions
• Theory of Orbital Ordering, Fluctuation and Resonant X-ray Scattering in Manganites
• Resonant X-ray Study on the Bi-Layered Perovskite Mn Oxide LaSr2Mn2O7
• Octahedral tilts and electronic correlations in La_7/8Sr_1/8MnO_3