Abstract
The anisotropic superconductivity has been considered in the two-dimensional Hubbard model. We allow for on and off-site intralayer Cooper pairs. Interlayer momentum-conserving Josephson tunneling which couples adjacent layers has been taken into account. The meanfield solution for the superconducting transition temperature demonstrates the competition between local Coulomb repulsion and interlayer tunneling in thes-wave channel. This competition leads to the mixedsd superconducting state at low doping. We also demonstrate thatc-phonon-assisted transitions between intra and interlayer states can effectively give rise to momentum-conserving Josephson tunneling.
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Biesiada, J., Zieliński, J. s-Wave vs.d -Wave Superconductivity in the Two-Dimensional Hubbard Model. J Supercond 10, 513–517 (1997). https://doi.org/10.1007/BF02767688
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DOI: https://doi.org/10.1007/BF02767688