Phenomenological model for two gap states in underdoped high-temperature superconductors and short-range antiferromagnetic correlation effect

TL;DR

This paper models the pseudogap state in underdoped high-temperature superconductors by distinguishing antiferromagnetic correlations from d-wave superconductivity, revealing their unique spectral signatures despite shared symmetry.

Contribution

It introduces a phenomenological model that differentiates antiferromagnetic correlations from superconductivity in spectral properties of underdoped cuprates.

Findings

Spectral weight analysis distinguishes the two correlations.

Density of states shows clear differences between correlations.

Finite-range antiferromagnetic effects are significant in pseudogap modeling.

Abstract

Assuming antiferromagnetic orbital correlations to model the pseudogap state in the underdoped high-temperature superconductors, we study how this correlation is distinguished from the d-wave superconductivity correlation with including the finite-range antiferromagnetic correlation effect. In spite of the fact that both correlations have the same d-wave symmetry, the contributions from each correlation is clearly distinguished in the spectral weight and the density of states.