Vibronic Mechanism of the Isotope and Pressure Effects in Cuprates

Details Vibronic Mechanism of the Isotope and Pressure Effects in Cuprates Vibronic Mechanism of the Isotope and Pressure Effects in Cuprates

1998-10-26

arxiv.org/abs/cond-mat/9810333v1

Physics

Condensed Matter

Superconductivity

6 pages; to appear in Proceedings of XIV Int. Symposium on Electron-Phonon Dynamics and Jahn-Teller Effect

Scientific paper

The doped cuprates are considered to be a system of local spinless bosons moving in a lattice of the hole pseudo-Jahn-Teller centers CuO_{4}^{5-}. A detailed qualitative and quantitative description of the vibronic mechanism determining both the isotope substitution and the external pressure effect on T_c is given. This mechanism can properly interpret the principal peculiarities of isotopic and baric effects in cuprates except the region of the well developed percolation phenomena

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