Resonant X-Ray Emission Spectroscopy in La_2CuO_4 and CuO

概要

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Resonant X-ray emission spectra (RXES) due to the Cu 3d→2p electronic transition under the Cu 2p→3d resonant excitation in La_2CuO_4 and CuO are theoretically investigated. It is predicted that, with this spectroscopy, one can obtain direct information on the difference of the a_<1g> states between La_2CuO_4 and CuO, which is a characteristic difference in the electronic states between the so-called p-type high-T_c superconductors and CuO, as has been shown in our theoretical analysis of the Cu 2p-XES under the excitation of a Cu 2p electron to a high energy continuum. Strong polarization dependence of the Cu 2p-RXES enables us to determine the electronic structure. It is pointed out that the 2p-RXES is a powerful probe in the study of the 3d electronic states in transition metal compounds subjected to the crystal field, anisotropic hybridization and 3d multiplet couplings.
社団法人日本物理学会の論文
1993-02-15