Antiferromagnetic fluctuations, symmetry and shape of the gap function in the electron-doped superconductors: the functional renormalization-group analysis
arXiv:cond-mat/0511120 · doi:10.1103/PhysRevB.74.174523
Abstract
The problem of the symmetry of the superconducting pairing and the form of the gap function in the electron-doped superconductors is reconsidered within the temperature-cutoff functional renormalization group approach combined with the Bethe-Salpeter equations. The momentum dependence of the order parameter for antiferromagnetic and superconducting instabilities in these compounds is analyzed. The gap function in the antiferromagnetic (particle-hole) channel has its maxima at the hot-spots, or at the diagonal of the Brilloin zone in their absence. The wavefunction in the singlet superconducting channel is non-monotonic in the vicinity of the (pi,0) and (0,pi) points, in striking similarity with recent experimental data. An instability in the triplet superconducting channel is much weaker than the singlet one and has an f-wave like form of the gap function.
arXiv comment4 pages, RevTex
References in corpus (16)
- d-wave superconductivity and Pomeranchuk instability in the two-dimensional Hubbard model
- Renormalization group analysis of the 2D Hubbard model
- Superconducting Gap Anisotropy and Quasiparticle Interactions: a Doping Dependent ARPES Study
- Weak Pseudogap Behavior in the Underdoped Cuprate Superconductors
- The temperature-flow renormalization group and the competition between superconductivity and ferromagnetism
- Spin-fermion model near the quantum critical point: one-loop renormalization group results
- Direct Observation of Non-Monotonic dx2-y2-Wave Superconducting Gap in Electron-Doped High-Tc Superconductor Pr0.89LaCe0.11CuO4
- Nonmonotonic d_{x^2-y^2} Superconducting Order Parameter in Nd_{2-x}Ce_xCuO_4
- Magnetic and superconducting instabilities of the Hubbard model at the van Hove filling
- Electronic structure of underdoped cuprates
- The Superconducting Instabilities of the non half-filled Hubbard Model in Two Dimensions
- Renormalization group analysis of magnetic and superconducting instabilities near van Hove band fillings
- Phase separation in the Hubbard model
- Electron-doping versus hole-doping in the 2D t-t' Hubbard model
- Theoretical analysis of magnetic Raman scattering in La2CuO4: two-magnon intensity with the inclusion of ring exchange
- Hot Spots and Transition from d-Wave to Another Pairing Symmetry in the Electron-Doped Cuprate Superconductors