Abstract
The current state of theoretical and experimental studies on the electronic structure of high-T c superconductors is analyzed. The agreement between the theory and experimental spectroscopic data is shown to be rather poor in certain cases. The reason is that the X-ray and electronic spectra reveal strong electron correlations. At the same time, no realistic model has been developed up to now in which both one-electron and multielectron mechanisms of the formation of the spectra could be described in a unified way in compounds containing transition and rare-earth elements. In this paper, particular attention is paid to a sudden-perturbation model, by which it has been possible to describe or interpret some X-ray and electronic spectra, including both one-electron and multielectron effects.
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Translated from Fizika Tverdogo Tela, Vol. 42, No. 5, 2000, pp. 770–790.
Original Russian Text Copyright © 2000 by Avramov, Ovchinnikov.
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Avramov, P.V., Ovchinnikov, S.G. Effects of strong electron correlations in X-ray and electron spectra of high-T c superconductors. Phys. Solid State 42, 788–809 (2000). https://doi.org/10.1134/1.1131293
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DOI: https://doi.org/10.1134/1.1131293