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High-temperature superconductivity and the characteristics of the electronic energy spectrumThe possibility is indicated of applying the theory of superconductors with overlapping energy bands to describe the thermodynamic and electromagnetic properties of the high-temperature compounds La2−x(Ba,Sr)xCuO4 and YВа2Сi3О7−δ. The two-band model was used to obtain high values of Tc, two energy gaps 2Δ1/Tc>3,5 and $2\Delta_2/T_c
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