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VOLUME 49 (1989) | ISSUE 10 | PAGE 573
Modulation of superexchange and covalent binding in metal oxides by current-carrier fluctuations
A local suppression of covalent copper-oxygen binding by current carriers through intra-atomic correlations leads to an effective electron-phonon coupling, fluctuations in the super exchange integral, and an exciton component of the attraction of holes. An isotope effect and the relaxation of the spins of copper nuclei are discussed.