Charge transfer and Mott-Hubbard excitations in FeBO3: An Fe K-edge resonant inelastic x-ray scattering study

Article

关键词: TRANSITION-METAL COMPOUNDS;    ELECTRONIC-STRUCTURE;    ABSORPTION-SPECTRA;    OPTICAL-PROPERTIES;    EMISSION SPECTRA;    FERROMAGNET;    DEPENDENCE;    COMPLEXES;    RAMAN;   

DOI  :  10.1103/PhysRevB.83.235109

来源: SCIE

【 摘 要 】

Momentum-resolved resonant inelastic x-ray scattering (RIXS) spectroscopy has been carried out successfully at the Fe K-edge for the first time. The RIXS spectra of a FeBO3 single crystal reveal a wealth of information on similar or equal to 1-10 eV electronic excitations. The IXS signal resonates when the incident photon energy approaches the pre-edge (1s-3d) and the main-edge (1s-4p) of the Fe K-edge absorption spectrum. The RIXS spectra measured at the pre-edge and the main-edge show quantitatively different dependences on the incident photon energy, momentum transfer, photon polarization, and temperature. We present a multielectron analysis of the Mott-Hubbard (MH) and charge transfer (CT) excitations, and calculate their energies. Electronic excitations observed in the pre-edge and main-edge RIXS spectra are interpreted as MH and CT excitations, respectively. We propose the electronic structure around the chemical potential in FeBO3 based on the experimental data.

【 授权许可】

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