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Vibronic Mechanism of the Isotope and Pressure Effects in Cuprates

A. S. Moskvin, Yu. D. Panov

cond-mat.supr-conarXiv:cond-mat/9810333

Abstract

The doped cuprates are considered to be a system of local spinless bosons moving in a lattice of the hole pseudo-Jahn-Teller centers CuO45-. A detailed qualitative and quantitative description of the vibronic mechanism determining both the isotope substitution and the external pressure effect on Tc 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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