Electron Correlation Effects in Resonant Inelastic X-ray Scattering of NaV2O5

Details Electron Correlation Effects in Resonant Inelastic X-ray Scattering of NaV2O5 Electron Correlation Effects in Resonant Inelastic X-ray Scattering of NaV2O5

2002-01-27

arxiv.org/abs/cond-mat/0201497v1

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, four figures, accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.88.077401

Element- and site-specific resonant inelastic x-ray scattering spectroscopy (RIXS) is employed to investigate electron correlation effects in {$\rm NaV_2O_5$}. In contrast to single photon techniques, RIXS at the vanadium $L_3$ edge is able to probe $d-d^*$ transitions between V d-bands. A sharp energy loss feature is observed at -1.56 eV, which is well reproduced by a model calculation including correlation effects. The calculation identifies the loss feature as excitation between the lower and upper Hubbard bands and permits an accurate determination of the Hubbard interaction term $U= 3.0 \pm 0.2$ eV.

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