This article is cited in 39 papers

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Phase diagram of $\mathrm{La}_{2-x}M_x\mathrm{CuO}_4$ as the key to understanding the nature of high-$T_c$ superconductors

K. V. Mitsen, O. M. Ivanenko

P. N. Lebedev Physical Institute, Russian Academy of Sciences

Abstract: Results of high-$T_c$ superconductivity studies are analyzed using the authors' model, which assumes that the interaction of electrons with two-site negative-$U$ centers (due to charged dopant localization near impurity ions) is responsible for many anomalous properties, and indeed the very superconductivity, of high-$T_c$ superconductors. It is shown that the basic properties of high-$T_c$ superconductors and the details of the superconducting and magnetic phase diagrams of $\mathrm{La}_{2-x}M_x\mathrm{CuO}_4$ ($M=\mathrm{Ba},\mathrm{Sr}$) can be explained by this model.

PACS: 74.20.-z, 74.62.Dh, 74.72.-h

Received: December 18, 2002
Revised: January 9, 2004

DOI: 10.3367/UFNr.0174.200405c.0545

 English version: Physics–Uspekhi, 2004, 47:5, 493–510

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