Octahedral tilts and electronic correlations in La_7/8Sr_1/8MnO_3

Details Octahedral tilts and electronic correlations in La_7/8Sr_1/8MnO_3 Octahedral tilts and electronic correlations in La_7/8Sr_1/8MnO_3

2006-03-09

arxiv.org/abs/cond-mat/0603226v1

Phys. Rev. B, 75, 014405 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.75.014405

We present a resonant x-ray scattering study of the octahedral tilt order between 50K and 310K in La_7/8Sr_1/8MnO_3. At the La L_II-edge the resonant (300) reflection probes cooperative tilts of the MnO_6-octahedra in this material, as verified by a model caclulation as well as a LDA+U study. The investigation of the octahedral tilts as a function of temperature and the comparison to the lattice parameters, the magnetization and the superlattice reflections related to charge and/or orbital order reveal an intimate coupling between electronic and tilt degrees of freedom in La_7/8Sr_1/8MnO_3.

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