Resonant inelastic x-ray scattering study of the electronic structure of Cu$_2$O

Details Resonant inelastic x-ray scattering study of the electronic structure of Cu$_2$O Resonant inelastic x-ray scattering study of the electronic structure of Cu$_2$O

2009-04-24

arxiv.org/abs/0904.3937v1

Physics

Condensed Matter

Materials Science

7 pages, 6 figures

Scientific paper

A resonant inelastic x-ray scattering study of the electronic structure of the semiconductor cuprous oxide, $\rm Cu_2O$, is reported. When the incident x-ray energy is tuned to the Cu K-absorption edge, large enhancements of the spectral features corresponding to the electronic transitions between the valence band and the conduction band are observed. A feature at 6.5 eV can be well described by an interband transition from occupied states of mostly Cu 3d charactor to unoccupied states with mixed 3d, 4s and 2p character. In addition, an insulating band gap is observed, and the momentum dependence of the lower bound is measured along the $\Gamma-R$ direction. This is found to be in good agreement with the valence band dispersion measured with angle-resolved photoemission spectroscopy.

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