Possibility of gapless superconductivity in metaloxides

Temperature dependences of the order parameters and the energy gap of high-temperature superconductors are investigated by using the specific geometry of the CuO2 plane. It is shown that the effects of charge carrier scattering by spin fluctuations of the copper subsystem do not have a large effect on the behavior of the order parameter but lead to an abrupt decrease of the energy gap in the excitation spectrum. Gapless superconductivity can exist over the entire temperature range under certain relations between the system parameters.

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