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- W1617679322 abstract "We have investigated Mn K edge resonant scattering from a single crystal of the bilayered manganite ${mathrm{LaSr}}_{2}{mathrm{Mn}}_{2}{mathrm{O}}_{7}$ in the charge/orbital ordered state $(T=170mathrm{K}).$ A strong intensity enhancement of the tetragonal superlattice reflection $(ensuremath{-}frac{1}{4},frac{1}{4},10)$ has been observed as the x-ray energy is tuned to the Mn K edge. In recent years a strong controversy arose regarding the nature of these kinds of superlattice reflections, i.e., whether their origin is due to Jahn-Teller distortion, orbital ordering, or both. We have thus performed realistic calculations to simulate the resonant signal, based on multiple-scattering theory and the finite difference method. We have found that Jahn-Teller distortion alone correctly describes the main features of the experimental data, the orbital ordering contribution being one order-of-magnitude smaller in amplitude." @default.
- W1617679322 created "2016-06-24" @default.
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- W1617679322 date "2003-07-23" @default.
- W1617679322 modified "2023-10-17" @default.
- W1617679322 title "Resonant x-ray scattering fromLaSr2Mn2O7at the MnKedge" @default.
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- W1617679322 doi "https://doi.org/10.1103/physrevb.68.024414" @default.
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