Topological asymmetry in the damping-pairing contribution of electron-boson scattering

Abstract

We make a harmonic analysis of the pairing and damping contribution of a finite $k$ range isotropic electron-phonon (or other boson) scattering in an anisotropic two-dimensional electronic system. We show that the pairing contribution of the anisotropic part of the electronic system can be much larger than its damping contribution enhancing significantly T_c. The higher is the order of the harmonic of the electronic anisotropy, smaller is its damping contribution and higher can be the asymmetry in its damping-pairing contribution. This could explain the puzzle of a much broader quasiparticle peak in the n-doped than in the p-doped cuprates, their smaller T_c's being also attributed to larger damping effects.

LATEX file and 3 Postscript figures

References in corpus (6)

• Relation of Extended Van Hove Singularities to High-Temperature Superconductivity within Strong-Coupling Theory
• Nesting Mechanism for d-symmetry Superconductors
• $P{b}_{0.4}B{i}_{1.6}S{r}_{2}C{a}_{1}C{u}_2{O}_{8+x}$ and Oxygen Stoichiometry: Structure, Resistivity, Fermi Surface Topology and Normal State Properties
• Density of States Driven Anisotropies Induced by Momentum Decoupling in High-Tc Superconductors
• Role of Van Hove Singularities and Momentum Space Structure in High-Temperature Superconductivity
• The boson mediators of high-Tc superconductivity: phonons versus composite bosons from the superconducting phenomenology