Microscopic Spectral Model of High Temperature Superconductors

TL;DR

This paper introduces a purely orbital, self-organized dopant filament model that explains the doping evolution of Fermi arcs, quasiparticle transitions, and temperature-dependent strains in high-temperature cuprate superconductors without adjustable parameters.

Contribution

It presents a novel orbital-based filamentary model that accounts for multiple experimental observations in cuprate superconductors, advancing understanding of their complex behavior.

Findings

Explains Fermi arc evolution with doping

Accounts for abrupt quasiparticle transitions

Links temperature strains to filament relaxation

Abstract

The self-organized dopant percolative filamentary model, entirely orbital in character (no spins), explains the evolution with doping of Fermi arcs observed by ARPES, including the abrupt transitions in quasiparticle strength observed near optimal doping in cuprate high temperature superconductors. Similarly abrupt transitions are also observed in time-resolved picosecond relaxation spectroscopy at 1.5 eV, and these are explained as well, using no new assumptions and no adjustable parameters. The anomalous "precursive" temperature-dependent strains observed by EXAFS are associated with relaxation of filamentary ends.