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Stability of the superconducting \({d_{{x^2} - {y^2}}}\) phase in high-T c superconductors with respect to the intersite coulomb repulsion of holes at oxygen

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Abstract

It has been shown that, because of the two-orbital character of the subsystem of holes located at oxygen sites and the spatial separation of this subsystem from that of spins at copper ions, the superconducting phase in high-T c superconductors is stable with respect to the strong Coulomb repulsion of holes located at nearestneighbor oxygen sites if the order parameter has the \({d_{{x^2} - {y^2}}}\) symmetry. This effect is due to the symmetry characteristics of the Coulomb potential, owing to which the equation determining the Cooper pairing in the \({d_{{x^2} - {y^2}}}\) channel does not include this potential.

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Authors and Affiliations

  1. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia

    V. V. Val’kov, D. M. Dzebisashvili & M. M. Korovushkin

  2. Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 142190, Russia

    A. F. Barabanov

Authors
  1. V. V. Val’kov
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  2. D. M. Dzebisashvili
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  3. M. M. Korovushkin
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  4. A. F. Barabanov
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Corresponding author

Correspondence to V. V. Val’kov.

Additional information

Original Russian Text © V.V. Val’kov, D.M. Dzebisashvili, M.M. Korovushkin, A.F. Barabanov, 2016, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2016, Vol. 103, No. 6, pp. 433–437.

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Val’kov, V.V., Dzebisashvili, D.M., Korovushkin, M.M. et al. Stability of the superconducting \({d_{{x^2} - {y^2}}}\) phase in high-T c superconductors with respect to the intersite coulomb repulsion of holes at oxygen. Jetp Lett. 103, 385–389 (2016). https://doi.org/10.1134/S0021364016060114

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  • DOI: https://doi.org/10.1134/S0021364016060114

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