Analysis of resonant inelastic x-ray scattering in La2CuO4

Details Analysis of resonant inelastic x-ray scattering in La2CuO4 Analysis of resonant inelastic x-ray scattering in La2CuO4

2003-12-24

arxiv.org/abs/cond-mat/0312624v2

Phys. Rev. B 71, 035110 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.71.035110

We provide a semiquantitative explanation of a recent experiment on the resonant inelastic x-ray scattering (RIXS) in insulating cuprate La2CuO4 (Y.J. Kim et al., Phys. Rev. Lett. 89, 177003 (2002).). We show theoretically that there are three characteristic peaks in RIXS spectra, two of which are attributed to the charge transfer excitation and are reasonably assigned to those observed experimentally. The lowest energy peak has a relatively large dispersion ($\sim 0.8$ eV) and is suppressed near the zone corner (\pi, \pi), in agreement with the experiment. We stress that electron correlation is an essential factor for explaining the overall energy-momentum dependence of the RIXS spectra consistently.

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