Eliashberg Analysis of Temperature Dependent Pairing Mechanism in d-Wave Superconductors: Application to High Temperature Superconductivity

TL;DR

This paper extends Eliashberg theory to analyze the temperature and frequency dependence of self energies in d-wave superconductors, focusing on the impact of the 40 meV spin resonance mode on high-temperature superconductivity.

Contribution

It introduces a finite-temperature Eliashberg analysis incorporating spin resonance effects, advancing understanding of pairing mechanisms in high-Tc cuprates.

Findings

Temperature dependence of self energies characterized

Spin resonance mode significantly influences pairing

Enhanced fit to experimental tunneling data

Abstract

Results are presented for the temperature and frequency dependence of the real and imaginary parts of the diagonal self energy for a d-wave superconductor. An Eliashberg analysis, which has been successful in recent fitting of superconductor-insulator-superconductor tunnel junction conductances for BiSrCaCuO (Bi-2212), is extended to finite temperatures. The effect of the temperature dependence of the 40 meV spin resonance mode, measured in inelastic neutron scattering (INS) in Bi-2212, on the finite temperature self energies is investigated.