Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping

Abstract

The Kohn-Luttinger mechanism for superconductivity is investigated in a model for the electron doped cuprates. The symmetry of the order parameter of the superconducting phase is determined as a function of the geometry of the Fermi surface together with the structure of the electron-hole susceptibility. It is found to remain d_{x^2-y^2} wave within a large doping range. The shape of the gap anisotropy evolves with doping, with the maximum gap moving away from (pi ,0), in good agreement with recent experiments. As the shift of the maximum increases, a crossover to d_{xy}-symmetry is found.

7 eps figures, revtex. Corrected and expanded version accepted for Phys. Rev. B

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Cited by in corpus (12)

• Pairing symmetry of the one-band Hubbard model in the paramagnetic weak-coupling limit: a numerical RPA study
• Intermediate Coupling Model of the Cuprates
• Pairing in the Two-Dimensional Hubbard Model from Weak to Strong Coupling
• Mode-Coupling Model of Mott Gap Collapse in the Cuprates: Natural Phase Boundary for Quantum Critical Points
• Nonmonotonic $d_{x^2-y^2}$ superconducting gap in electron-doped Pr${}_{0.89}$LaCe${}_{0.11}$CuO${}_4$: Evidence of coexisting antiferromagnetism and superconductivity?
• Hot Spots and Transition from d-Wave to Another Pairing Symmetry in the Electron-Doped Cuprate Superconductors
• Revisiting superconductivity in the extended one-band Hubbard model: pairing via spin and charge fluctuations
• Superconducting phase diagram of itinerant antiferromagnets
• Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors
• Charge doping to flat AgF2 monolayers in a chemical capacitor setup
• Energy Scales in the Raman spectrum of electrons and hole doped cuprates within competing scenarios
• Renormalization group approach to anisotropic superconductivity