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期刊论文
Anomalous resonant inelastic x-ray scattering dispersions of Sr2CuO3 measured at the Cu 1s→3d edge
PHYSICAL REVIEW B 73, 161104 (R) (2006),-0001,():
We report on resonant inelastic x-ray scattering studies of a one-dimensional quantum spin system Sr2CuO3. Data were taken at the Cu 1s→3d edge, which is expected to provide dd excitation spectra. The energy loss spectra show the lowest peak near 2.0 eV, smaller by≈0.6 eV than the lowest energy peak obtained at the 1s→4p edge. The feature has a total dispersion of about 0.2 eV with a periodicity of. While a comparison with optical measurements supports the interpretation of the data as being from dd excitations, the dispersion is apparently incompatible with theoretical results.
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