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Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems

P. Olalde-Velasco, J. Jiménez-Mier, J. D. Denlinger, Z. Hussain, W. L. Yang
2011 Physical Review B  

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We report the most direct experimental verification of Mott-Hubbard and charge-transfer insulators through x-ray emission spectroscopy in transition-metal (TM) fluorides. The p-d hybridization features in the spectra allow a straightforward energy alignment of the anion-2p and metal-3d valence states, which visually shows the difference between the two types of insulators. Furthermore, in parallel with the theoretical Zaanen-Sawatzky-Allen diagram, a complete experimental systematics of the 3d
more » ... oulomb interaction and the 2p-3d charge-transfer energy is reported and could serve as a universal experimental trend for other TM systems including oxides.
doi:10.1103/physrevb.83.241102 fatcat:mrwaai6tbjgzvjmssssyfnosgq
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P. Olalde-Velasco, J. Jiménez-Mier, J. D. Denlinger, Z. Hussain, W. L. Yang. "Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems." Physical Review B 83.24 (2011)