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Journal Articles

Resonant X-ray scattering in KCuF$$_{3}$$

Takahashi, Manabu*; Igarashi, Junichi

Physica B; Condensed Matter, 329-333(Part2), p.870 - 871, 2003/05

 Times Cited Count:2 Percentile:15.11(Physics, Condensed Matter)

We study the resonant X-ray scattering (RXS) spectra around the Cu K edge in KCuF$$_{3}$$ on the basis of the band structure calculation combined with the LDA+U approximation. The lattice distortion is introduced as inputs of the calculation. We reproduce well the experimental spectra as a function of photon energy around the main--K--edge (MKE). The spectral structure around the MKE is independent of the magnetic order (MO) and the orbital order (OO) but strongly dependent on the magnitude of the Jahn--Teller distortion (JTD).

Journal Articles

Orbital ordering in manganites and ruthenates

Hotta, Takashi; Dagotto, E.*

Physica B; Condensed Matter, 312-313(1-4), p.700 - 702, 2002/03

 Times Cited Count:2 Percentile:14.62(Physics, Condensed Matter)

The crucial role of the orbital degree of freedom is here discussed in order to understand the complex spin and charge structures of transition metal oxides. For manganites, it is shown that diagonal charge stripes in the ferromagnetic phase are induced by the staggered orbital ordered pattern, while for ruthenates, a novel orbital ordering is found to exist in the G-type antiferromagnetic structure, with a hole arrangement as recently observed in X-ray experiments.

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