Interplay between single particle coherence and kinetic energy driven superconductivity in doped cuprates

TL;DR

This paper investigates how single particle coherence influences the superconducting transition temperature in doped cuprates within a kinetic energy driven mechanism, reproducing experimental neutron scattering features.

Contribution

It introduces a detailed analysis of the interplay between single particle coherence and superconductivity, highlighting their combined effect on transition temperatures and experimental signatures.

Findings

Superconducting transition temperature peaks at optimal doping.

Single particle coherence suppresses transition temperature across the superconducting range.

Calculated spin structure factor matches experimental neutron scattering data.

Abstract

Within the kinetic energy driven superconducting mechanism, the interplay between the single particle coherence and superconducting instability in doped cuprates is studied. The superconducting transition temperature increases with increasing doping in the underdoped regime, and reaches a maximum in the optimal doping, then decreases in the overdoped regime, however, the values of this superconducting transition temperature in the whole superconducting range are suppressed to low temperature due to the single particle coherence. Within this superconducting mechanism, we calculate the dynamical spin structure factor of cuprate superconductors, and reproduce all main features of inelastic neutron scattering experiments in the superconducting-state.