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

  title={Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping},
  author={F. Guinea and R. Markiewicz and M. Vozmediano},
  journal={Physical Review B},
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 (π,0), in good agreement with… Expand
6 Citations
Renormalization group approach to anisotropic superconductivity
Author(s): Roldan, R; Tsai, SW; Lopez-Sancho, MP | Abstract: The superconducting instability of the Fermi-liquid state is investigated by considering anisotropic electron-boson couplings. BothExpand
Intermediate coupling model of the cuprates
We review the intermediate coupling model for treating electronic correlations in the cuprates. Spectral signatures of the intermediate coupling scenario are identified and used to adduce that theExpand
The Kohn-Luttinger mechanism and phase diagram of the superconducting state in the Shubin-Vonsovsky model
Using the Shubin-Vonsovsky model in the weak-coupling regime W > U > V (W is the bandwidth, U is the Hubbard onsite repulsion, and V is the Coulomb interaction at neighboring sites) based on theExpand
Pairing in the two-dimensional Hubbard model from weak to strong coupling
The Hubbard model is the simplest model that is believed to exhibit superconductivity arising from purely repulsive interactions, and has been extensively applied to explore a variety ofExpand
Weakly interacting electrons and the renormalization group
We present a general method to study weak-coupling instabilities of a large class of interacting electron models in a controlled and unbiased way. Quite generally, the electron gas is unstableExpand
Hot spots and transition from d-wave to another pairing symmetry in the electron-doped cuprate superconductors
We present a simple theoretical explanation for a transition from d-wave to another superconducting pairing observed in the electron-doped cuprates. The ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ pairingExpand


Superconductivity in High Tc Cuprates: The Cause is No Longer A Mystery
I discuss various direct calculations of the properties of the one-band Hubbard model on a square lattice and conclude that these properties sufficiently resemble those of the cuprate superconductorsExpand